This answer is correct because core profile data (name, email) should be maintained within Experience Cloud as the primary system when using communities as an identity provider (IDP) for commerce. This ensures that customers have a consistent identity across both platforms and can access self-service support features in communities. References: https://help.salesforce.com/s/articleView?id=sf.
b2c_commerce_service_cloud_integration.htm&type=5

Syncing Person Account object can help map subscriber data in Marketing Cloud when the company has Person Account set up on their Sales Cloud. This can enable bi-directional data integration between Sales Cloud and Marketing Cloud for Person Accounts, which are records that combine both Account and Contact information for individuals. References:
* https://help.salesforce.com/s/articleView?id=sf.mc_co_person_accounts.htm&type=5

CDP is a feature that allows creating a unified and holistic view of the customer across different systems and channels. CDP can use various identifiers, such as email, phone, or social media, to recognize customers as humans and extend existing records related to that human across connected systems, such as B2C Commerce, Service Cloud, and Marketing Cloud. CDP can also assign a consistent Global Party ID to each human, which can be used as a unique identifier across the systems. Reference: https://www.salesforceben.com/the-drip/complete-guide-to-customer-data-platforms-and-salesforce-cdp/

This answer is correct because Salesforce Privacy Center is a tool that helps satisfy customer requests and data privacy laws related to the right-to-be-forgotten requirement. Salesforce Privacy Center allows admins to create policies that delete, archive, or de-identify the data subject's PII in an org within 30 days of their request, without additional development. Reference: https://help.salesforce.com/s/articleView?id=privacy_center.htm&type=5&language=en_US