You are a network administrator for a company named Contoso, Ltd. The company has offices in New York, Boston and Montreal. Each office contains an Active Directory site as show in the exhibit.

All access to the Internet is routed through the Montreal office. Only TCP ports 80, 25, and 443 are allowed from the Internet to the internal network. You plan to deploy an Exchange Server 2010 Service Pack 1 (SP1) organization. Each site will contain a Mailbox server and a Hub Transport server.

You need to recommend where to place the Client Access servers for the organization. The solution must minimize software costs.

Where should you recommend placing the Client Access servers?

A.
in the Boston site and the New York site

B.
in the Montreal site and the New York site

C.
in the Montreal site only

D.
in the Montreal site, the New York site, and the Boston site