Your company has three offices. Each office is configured as an Active Directory site.
You have three servers that have Exchange Server 2013 installed named EX1, EX2 and EX3. All three servers
have the Client Access server role and the Mailbox server role installed.
The Active Directory site links and costs are configured as shown in the exhibit. (Click the Exhibit button.)

Site B is designated as a hub site.
EX2 fails.You discover that all email messages sent from the users in Site A to the users in Site C are queued on a
server in Site A.
You need to ensure that the email messages are sent to Site C as quickly as possible.
What should you do first?

A.
Modify the Active Directory site link costs.

B.
Configure Site A as a hub site.

C.
Modify the Exchange-specific site link cost.

D.
Remove the hub site.