You are the senior desktop administrator for YourDomain.com. You are required to choose a phone that supports many speed dials and is reachable via multiple lines. Which Cisco Unified IP phone solution would be the best choice?

A.
Cisco Unified IP Phone 7906G

B.
Cisco Unified IP Phone 7931G

C.
Cisco Unified IP Phone 7945G

D.
Cisco Unified IP Phone 7971G