What should you do?

Your network consists of one Active directory domain. All domain controllers run Windows Server 2008. The network contains both portable and desktop computers.
Your company has two departments named Sales and Engineering. You create one organizational unit (OU) for each department.
You move all user and computer accounts to their respective OUs.
You need to prepare the environment for the deployment of Group Policy objects (GPO) to meet the following requirements:
Remote users in the Sales department must be able to save documents to any USB flash drive.
Remote users in the Engineering department must be able to save documents only to USB flash drives supplied by the company.
Local network users from both departments must be able to use a USB mouse and a USB keyboard.
What should you do?
A. Create a single GPO for both OUs.
B. Modify the Default Domain Policy. Create a new GPO for each OU.
C. Create a new OU for all desktop computers. Create a GPO for the new OU.
D. Modify the Default Domain Controllers Policy. Create a new GPO for each OU.