A company named Contoso Ltd. has three offices. Each office is configured as an Active Directory site
and contains multiple Exchange servers. Each office has a team of network support technicians. You
are designing an Exchange organization for Contoso. All servers in the organization will have
Exchange Server 2010 Service Pack 1 (SP1) installed. You need to implement a security solution to
ensure that the team of network support technicians can manage the Exchange servers in its
respective office only. Which of the following solutions is the best recommendation? (More than one
answer choice may achieve the goal. Select the BEST answer.)

A.
Three custom scopes and three management role groups

B.
One management role and three Active Directory security groups

C.
One custom scope and one management role group

D.
Three custom scopes, three management roles, and three Active Directory security groups