You are planning a Windows Presentation Basis (WPF) application for your organization by making use of Microsoft .Web Framework 4 and Microsoft Visual Studio 2010. The organization layer of the software is implemented by using Windows Communication Groundwork (WCF).

You plan to assistance non-repudiation and data integrity for WCF messages.
You need to style the security method for the software.

What really should you do?

A.
Attach a digital signature to the WCF messages.

B.
Encrypt the WCF messages by employing the Secure Sockets Layer (SSL) protocol.

C.
Encrypt the WCF messages by employing the Internet Protocol Protection (IPSec) protocol.

D.
Implement message-level security by using digital certificates as client computer credentials.