You need to ensure that users in Branch2 only authenticate to the domain controllers in Branch1

Your network contains an Active Directory domain. The domain is configured as shown in
the following table.

Users in Branch2 sometimes authenticate to a domain controller in Main.
You need to ensure that users in Branch2 only authenticate to the domain controllers in
Branch1.
What should you do?

A.
On DC1 and DC2, set the AutoSiteCoverage value to 1.
B.On DC1 and DC2, set the AutoSiteCoverage value to 0.
C.On DC3, set the AutoSiteCoverage value to 0.
D.On DC3, set the AutoSiteCoverage value to 1.