You are a system administrator for your company. The network has three System Center Data Protection Manager (DPM) 2006 servers. You need to perform the following tasks:
Install a single DPM 2007 server to protect data that is currently protected by the existing DPM 2006 servers. Ensure that current shadow volume replicas remain accessible until their expiration dates. What should you do?

A.
Install DPM 2007 on a new server. Move protection groups from the existing DPM 2006 servers to the new server by using the DPM Upgrade Tool. Uninstall DPM 2006 from all servers.

B.
Install DPM 2007 on a new server. Move protection groups from the existing DPM 2006 servers to the new server by using the DPM Upgrade Tool. Maintain the DPM 2006 servers until their replicas expire.

C.
Install DPM 2007 on all DPM 2006 servers. Move protection groups from all servers to one of the DPM 2007 servers by using the DPM Upgrade Tool. Maintain the three servers until the DPM 2006 replicas expire.

D.
Install DPM 2007 on one of the existing DPM 2006 servers. Move protection groups from the other two DPM 2006 servers by using the DPM Upgrade Tool. Uninstall DPM 2006 from all servers.