You have a computer&

You have a computer that runs Windows 7.You need to install the Exchange 2010 management tools on the computer.What should you do first？（）

• AInstall Telnet Client.
• BRun the Exchange Best Practices Analyzer.
• CSet the Net.TCP Port Sharing service to Automatic.
• DInstall Microsoft .NET Framework 3.5.1 and the Internet Information Services （IIS） 6.0 Management console.