Your company has three offices.

The network contains servers that run Windows Server 2003 Service Pack 2 (SP2).The relevant portion of the network is configured as shown in the exhibit.

You need to ensure that Server1 can communicate with computers in the other offices.

Which subnet mask should you assign to Server1?

A.
255.0.0.0

B.
255.255.255.0

C.
255.255.255.128

D.
255.255.255.192