Which two tasks should you recommend performing?

Your company has three data centers. The data centers are located in Montreal, New York,
and Seattle. You have an Exchange Server 2013 organization that contains six servers. The
servers are configured as shown in the following table.

The organization is configured as shown in the following exhibit. (Click the Exhibit button.)

The file share witness for DAG1 is located on EX3. You plan to implement site resiliency and
use a single name space named mail.contoso.com. You need to recommend a solution to
minimize the amount of time that the Exchange Server services are unavailable if either the
data center in Montreal or the data center in Seattle fails. Which two tasks should you
recommend performing? (Each correct answer presents part of solution. Choose two.)

A.
Deploy a hardware load balancer to EX3 and EX6.

B.
Create two DNS host (A) records for mail.contoso.com.

C.
Configure EX6 as an alternate file share witness.

D.
Move the file share witness to Server1.