Your network contains a Web server named Server1 that runs Windows Server 2003 Service Pack 2 （SP2）. Server1 has one Web site.  You configure Server1 to use a Web server certificate. Users report that they can access the Web site by using http：//server1 and https：//server1. You need to ensure that all traffic to， and from， Server1 is encrypted. What should you do？（）

• A、In IIS Manager， enable the Require secure channel （SSL） option.
• B、In IIS Manager， enable the Digest authentication for Windows domain servers option.
• C、In Local Security Policy， enable Domain Member： Require strong （Windows 2000 or later） session key.
• D、In Local Security Policy， enable Domain Member： Digitally encrypt or sign secure channel data （always）.