When determining the primary table in Customer Insights during the unification process, the goal is to choose the table that provides the most robust and accurate customer profile information.

Criterion A is crucial because having complete and reliable customer profile data ensures that the unified profile is accurate and comprehensive.

Criterion C is recommended by Microsoft when using Dynamics 365 data, as the contact table often serves as the primary source of customer information within the Dynamics 365 ecosystem.

While tables with many related tables or common attributes with other tables may provide supplementary information, they do not necessarily constitute the primary source for reliable customer data.