A corporate environment includes Exchange Server 2010 SP1. Client computers run Microsoft Outlook 2010 using Standard Client Access Licenses (CALs). You need to recommend a solution that allows long-term message archival and minimizes hardware costs.

Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A.
Acquire an Enterprise CAL for each user.

B.
Apply a retention policy tag to each mailbox.

C.
Create a retention policy tag and set the age limit for retention.

D.
Utilize personal archives that are stored in a cloud-based Exchange Server 2010 SP1 environment.