creating multiple similar products and distributing the skew across those products can be a way to mitigate issues related to lookup skew. The article explains that lookup skew happens when a very large number of records are associated with a single record in the lookup object, and this can cause record locking and performance issues. The article suggests creating multiple copies of the same product record and assigning different child records to each copy, so that the number of child records per parent record is reduced.

According to Trailhead2, record types are a feature that allows administrators to create different business processes, page layouts, and picklist values for different types of records within an object. Record types can be used to maintain different dealer types in Salesforce by creating record types for each of the dealer types and assigning them appropriate attributes, processes, and rules. Option A is the correct answer because it suggests using Accounts for dealers, and creating record types for each of the dealer types. Option B is incorrect because creating dealers as Accounts, and building custom views for each of the dealer types does not allow CRM users to enter only attributes related to the customer types, nor does it enable different processes and business rules for each of the customer types. Option C is incorrect because using Accounts for dealers and custom picklist field for each of the dealer types does not allow CRM users to enter only attributes related to the customer types, nor does it enable different processes and business rules for each of the customer types. Option D is incorrect because creating Custom objects for each dealer types and custom fields for dealer attributes can be unnecessary and complex, as it requires creating multiple objects and relationships instead of using the standard Account object.

To allow only the owner of a contact record to delete that contact, the data architect should create a "before delete" trigger to check if the current user is not the owner. The trigger can use the UserInfo.getUserId() method to get the current user's ID and compare it with the OwnerId field of the contact record. If they are not equal, the trigger can add an error to the record and prevent it from being deleted. The other options are not suitable for meeting the requirements, as they would either restrict the edit access or delete access for all users, regardless of ownership.

According to the official Salesforce guide1, big objects are designed to store and manage massive data volumes within Salesforce without affecting performance. They can be queried by using Async SOQL or standard SOQL, and they can be accessed by using Apex, Visualforce, Lightning components, or APIs. Big objects are ideal for storing data that is used for analytics or reporting purposes, such as the reward program data. Option A is the correct answer because it allows NTO to create a custom big object in Salesforce that can store the reward program data and make it available for consumption by Einstein Analytics and Discovery. Option B is incorrect because Einstein cannot connect directly to the point of sales system to capture the reward program data. Option C is incorrect because Einstein Analytics does not support creating big objects. Option D is incorrect because custom objects are not suitable for storing large volumes of data.