You have a computer that runs windows 7 professional.

A removable drive is attached to the computer.

You need to protect data on the removable drive by using Bitlocker To Go.

What should you do first?

A.
Upgrade the computer to Windows 7 Enterprise.

B.
Install all Windows Updates for Windows 7 Professional.

C.
Issue a digital certificate for the Encryption File System (EFS).

D.
Select the Encrypt contents to secure data checkbox from the properties on the removable drive.

Explanation:
Windows 7 Professional
Windows 7 Professional is available from retailers and on new computers installed by manufacturers. It supports all the features available in Windows Home Premium, but you can join computers with this operating system installed to a domain. It supports EFS and Remote Desktop Host but does not support enterprise features such as AppLocker, DirectAccess, BitLocker, and BranchCache.

Windows 7 Enterprise and Ultimate Editions
The Windows 7 Enterprise and Ultimate editions are identical except for the fact that Windows 7 Enterprise is available only to Microsofts volume licensing customers, and Windows 7 Ultimate is available from retailers and on new computers installed by manufacturers. The Enterprise and Ultimate editions support all the features available in other Windows 7 editions but also support all the enterprise features such as EFS, Remote Desktop Host, AppLocker, DirectAccess, BitLocker, BranchCache, and Boot from VHD.