An on-premise application is exposed to external users through a Windows Communication Framework (WCF) service endpoint registered in the Windows Azure AppFabric Service Bus.
You need to recommend an approach for providing transport-level security that maximizes performance and minimizes bandwidth requirements.
What should you recommend?

A.
Use reliable messaging.
Use HTTP for message delivery.

B.
Use binary message encoding.
Use TCP for message delivery.

C.
Use Plain Old XML (POX) messages.
Use TCP for message delivery.

D.
Use Message Transmission Optimization Mechanism (MTOM) message encoding.
Use HTTPS for message delivery.