This answer is correct because it is a way to store payment information while still maintaining security and compliance. A tokenized payment card is a method that replaces sensitive card data with a unique identifier or token that cannot be mathematically reversed. The actual card data is stored in a secure vault by a payment processor or gateway. This way, the company can facilitate one-click ordering and automatic payment without exposing or storing the actual card data. Reference: https://help.salesforce.com/s/articleView?id=sf.b2c_commerce_payment_processing.htm&type=5

A system is a software application or platform that provides specific functionality or capabilities for a business. A system can be either internal or external to Salesforce, depending on where it is hosted and how it is accessed. To deliver key capabilities for its B2C business, a company should use the following systems:
Sales Cloud: Sales Cloud is a product that allows managing sales processes and activities across different channels and devices. Sales Cloud can help the company to deliver a full list of all customer orders throughout their engagement lifetime, by integrating with B2C Commerce and other systems to capture and display order information on customer records.
Marketing Cloud: Marketing Cloud is a product that allows creating and delivering personalized marketing campaigns across different channels and devices. Marketing Cloud can help the company to provide lifetime engagement tracking and history of the customer, by integrating with B2C Commerce and other systems to collect and analyze customer behavior and interactions across touchpoints.
Salesforce Order Management: Salesforce Order Management is a product that allows managing and fulfilling orders across different channels and systems. Salesforce Order Management can help the company to calculate the lifetime value of customers based on their orders, by integrating with B2C Commerce and other systems to aggregate and report on order revenue and profitability.
Option B is incorrect because Service Cloud is a product that allows managing customer service interactions across different channels and systems. Service Cloud does not provide any of the capabilities that the company needs, such as delivering a full list of customer orders, providing lifetime engagement tracking, or calculating lifetime value of customers. Option C is incorrect because Heroku is a platform that allows building, running, and scaling custom web applications using various languages and frameworks. Heroku does not provide any of the capabilities that the company needs, such as delivering a full list of customer orders, providing lifetime engagement tracking, or calculating lifetime value of customers. Option D is incorrect because Materials Written is not a system, but rather a term that refers to written documents or content that are used for communication or education purposes. Materials Written does not provide any of the capabilities that the company needs, such as delivering a full list of customer orders, providing lifetime engagement tracking, or calculating lifetime value of customers. Reference:
https://www.salesforce.com/products/sales-cloud/overview/
https://www.salesforce.com/products/marketing-cloud/overview/
https://www.salesforce.com/products/commerce-cloud/ecommerce/order-management/

B2C Commerce Governance and Quotas are a set of rules and limits that apply to B2C Commerce instances to ensure the efficiency and stability of solutions built on the platform. The following considerations should be kept in mind when considering B2C Commerce Governance and Quotas:
Object quotas status is updated with an up to 20-minute delay. Therefore, a Solution Architect must consider this delay when performing calculations related to traffic and limits. Object quotas are limits on the number of objects that can be created or stored in B2C Commerce, such as products, categories, customers, orders, etc. The object quotas status shows the current usage and remaining capacity of each object quota. However, the status is not updated in real time, but with an up to 20-minute delay. This means that the Solution Architect should account for this delay when estimating the traffic and limits for each object quota.
If an enforced quota is exceeded, an exception is thrown, which prevents the current operation from completing. The Solution Architect should design the solution so that the exception can be caught within a customization. Enforced quotas are quotas that are strictly enforced by B2C Commerce and cannot be exceeded or changed by customers. Examples of enforced quotas are API calls per hour, script execution time, cache size, etc. If an enforced quota is exceeded, B2C Commerce throws an exception that stops the current operation from completing. This can result in errors or failures in the storefront or backend processes. The Solution Architect should design the solution so that the exception can be caught within a customization and handled gracefully.
Option B is incorrect because sandbox quotas cannot be softened by exporting them from a production instance and importing them onto a sandbox instance. Sandbox quotas are fixed and cannot be changed by customers. Option C is incorrect because the Solution Architect cannot assume that quota violations have not occurred unless a site is experiencing performance issues. Quota violations can occur without affecting the site performance, but they can still cause errors or failures in certain operations or processes. Reference:
https://documentation.b2c.commercecloud.salesforce.com/DOC1/topic/com.demandware.dochelp/Governance/GovernanceOverview.html
https://documentation.b2c.commercecloud.salesforce.com/DOC1/topic/com.demandware.dochelp/Governance/ObjectQuotas.html
https://documentation.b2c.commercecloud.salesforce.com/DOC1/topic/com.demandware.dochelp/Governance/EnforcedQuotas.html