Your company has two data centers. Each data center contains a perimeter network. Your network contains an Exchange Server 2010 organization. You plan to deploy Exchange Server 2010 Edge Transport servers in the perimeter networks. You need to recommend a solution for the Edge Transport servers that meets the following requirements：.Distribute inbound e-mail messages across all Edge Transport servers .Ensure that users receive inbound e-mail messages if an Edge Transport server fails .Ensure that users receive inbound e-mail messages if a single data center network becomes unavailable.Minimize costs What should you recommend？（）

A. In each perimeter network， deploy one Edge Transport server. Implement failover clustering.
B. In each perimeter network， deploy two Edge Transport servers. Implement failover clustering.
C. In each perimeter network， deploy one Edge Transport server. Configure a mail exchange （MX） record for each server.
D. In each perimeter network， deploy two Edge Transport servers. Configure a mail exchange （MX） record for each server.