HOTSPOT
Your company has an Exchange Server 2013 organization. All servers have the Client Access server
role and the Mailbox server role installed.
The DNS Manager is shown in the exhibit. (Click the Exhibit button.)
Use the drop-down menus to select the answer choice that completes each statement.
Answer: 
Explanation:
Why????
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The MX records points to mail.contoso.com (10) and ex1.contoso.com (100)
This way all the trafic goes to mail.contoso.com -> ex2
If You change the prioryty of MX for ex1 to 10 (like for the ex2) then it will be round robin (loadbalanced) by the DNS
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