How should an Architect design the data migration solution to meet this requirement?

Universal Containers (UC) is planning to move away from legacy CRM to Salesforce. As part of one-time data migration, UC will need to keep the original date when a contact was created in the legacy system.

How should an Architect design the data migration solution to meet this requirement?
A . After the data is migrated, perform an update on all records to set the original date in a standard CreatedDate field.
B . Create a new field on Contact object to capture the Created Date. Hide the standard CreatedDate field using Field -Level Security.
C . Enable "Set Audit Fields" and assign the permission to the user loading the data for the duration of the migration.
D . Write an Apex trigger on the Contact object, before insert event to set the original value in a standard CreatedDate field.

Answer: C