How should the architect approach the project so that the requirements are met?

Universal Containers (UC) has an open sharing model for its Salesforce users to allow all its Salesforce internal users to edit all contacts, regardless of who owns the contact. However, UC management wants to allow only the owner of a contact record to delete that contact. If a user does not own the contact, then the user should not be allowed to delete the record.

How should the architect approach the project so that the requirements are met?
A . Create a "before delete" trigger to check if the current user is not the owner.
B . Set the Sharing settings as Public Read Only for the Contact object.
C . Set the profile of the users to remove delete permission from the Contact object.
D . Create a validation rule on the Contact object to check if the current user is not the owner.

Answer: A