You are a messaging professional.

Your company uses a Microsoft Exchange Server 2007 messaging system. The company has one main
office and two branch offices situated in different zones. Each office has a local connection to the Internet.

A Client Access Server is deployed in each office. The Client Access Servers can be accessed on the
Internet. In the branch offices, the Hub Transport server role is installed on the same computer as the
Client Access Server role.

At the main office, dedicated Client Access Servers are deployed.

Your company is introducing a new third-party application that will run on the Client Access Servers. A
test lab environment is required to test this application prior to deployment. Your current lab
environment contains only a single domain controller and nothing else.

You need to design a test lab to perform a valid test for the new application. You also need to ensure that
you use the fewest possible servers in the test lab.

What should you do?

A.
Implement a Mailbox server role, a Hub Transport Server role, and a Client Access Server role on the same
computer.

B.
Implement a Mailbox server role on one computer, a Hub Transport server role on a second computer, and a
Client Access Server role on a third computer.

C.
Implement a Mailbox server, a Hub Transport server, and a Client Access Server on different computers.
Implement a Hub Transport server and a Client Access Server on the same computer.

D.
Implement a Mailbox server, a Hub Transport server, and a Client Access Server on the same computer.
Create another Microsoft Active Directory site. Install a domain controller in the second site. Implement a
Mailbox server, a Hub Transport server, and a Client Access Server on the same computer in the new site.