What are two possible ways to achieve this goal?

In your Exchange Server 2007 environment, a server named Server1 has the following server roles installed:
Client Access
Hub Transport
Mailbox
You need to add the Unified Messaging server role to Server1. What are two possible ways to achieve this goal? (Each correct answer presents a complete solution.
Choose two.)

A.
Use the Setup Wizard.

B.
Use Add or Remove Programs from Control Panel.

C.
Use the Setup command-line tool.

D.
Use the Exchange Management Console.