You have a single Active Directory directory service domain. Your domain controllers are configured as shown in the following table.

File and print services are on servers in Site1. Microsoft Exchange Server is installed on servers in Site2. The HR and user provisioning applications will be placed on servers in Site3.

You are planning placement of the RID Master FSMO role.

You need to ensure proper functionality of these applications within their sites during an extended WAN outage.

On which domain controller should you place the RID Master role?

A.
DC1

B.
DC2

C.
DC3

D.
DC4