Which approach should you recommend?

Your company has a SharePoint 2010 farm that has one Web application with multiple site collections. Your team
needs to meet the following requirements:
Certain individuals need to have the Full Control permission set on every site collection in the Web application.
.Permissions must be set in a central location and should effect all current and future site collections.
Which approach should you recommend?

A.
Add users to the local administrators group on the server.

B.
Add users to the Site Owners group in each site collection.

C.
Create a user policy for the Web application in Central Administration.

D.
Create a group policy in the Active Directory domain to which the SharePoint users authenticate.