How many servers should you deploy in each site?

Your company has a main office and a branch office. An Active Directory site exits for each office.
The offices are connected by a WAN link.
You plan to deploy Exchange Server 2013 in each site.
You need to identify the number of Exchange servers required to meet the following requirements:
– Maintain user access to mailboxes if a single server fails
– Use the minimize account of Exchange servers in each site
How many servers should you deploy in each site?

A.
1

B.
2

C.
3

D.
4