which node should you create the site link?

HOTSPOT
Your network contains an Active Directory forest named contoso.com that contains a single
domain. The forest contains three sites named Site1, Site2, and Site3.
Domain controllers run either Windows Server 2008 R2 or Windows Server 2012 R2. Each
site contains two domain controllers. Site1 and Site2 contain a global catalog server.
You need to create a new site link between Site1 and Site2. The solution must ensure that
the site link supports the replication of all the naming contexts.
From which node should you create the site link?
To answer, select the appropriate node in the answer area.

Answer:

Explanation:

http://technet.microsoft.com/en-us/library/cc731294.aspx