HOTSPOT
Your company has two main offices named Main1 and Main2. Each office has a data center.
You have an Exchange Server 2013 organization. Each data center contains several Exchange servers and
connects directly to the Internet. Each office has a Send connector to the Internet.
You configure each office as a separate site and you configure Main1 as a hub site.
The company opens a branch office that contains a small data center.
You deploy an Exchange Server 2013 server to the data center. The data center has a direct network link to
Main1.
All of the site link costs are set to the default values.
In the table below identity through which office the email message will be transmitted first for each scenario.
NOTE: Make only one selection in each row.
Hot Area:
Answer: 
Explanation:
https://technet.microsoft.com/en-us/library/jj916681(v=exchg.150).aspx