Your Network contains two Active Directory Sites named Site1 and Site2.
Both sites contain an equal number of users.
Each Site contains two Exchange Server 2013 MailboxServers.
You need to recommend a High-Availability solution that meets the following requirements:
– IF A SINGLE MAILBOX SERVER FAILS, THE ACTIVE MAILBOX DATABASE COPIES ON THAT SERVER
MUST FAIL OVER TO A MAILBOX SERVER IN THE SAME SITE.
– IF BOTH MAILBOX SERVERS IN THE SAME SITE FAIL, THE ACTIVE MAILBOX DATABASE COPIES
MUST BE SWITCHED OVER TO THE OTHER SITE MANUALLY.
– IF A WAN LINK FAILS, MULTIPLE COPIES OF THE SAME MAILBOX DATABASE MUST NOT BE
ACTIVATED IN BOTH SITES SIMULTANEOUSLY.
How should you configure the database availability groups (DAGs)? 
Answer: 
Explanation:
i love that there are two answers here.
my other study guide (that i paid for – not saying it’s correct) lists this:
One Dag
All servers from both sites
Replicas on the servers in both sites
Enabled
that`s the answer here…