Which Group Policy preference should you configure?

Your network contains an Active Directory domain named contoso.com. The domain
contains a domain controller named DC1 that runs Windows Server 2012 R2.
All client computers run Windows 8 Enterprise.
DC1 contains a Group Policy object (GPO) named GPO1.
You need to update the PATH variable on all of the client computers.
Which Group Policy preference should you configure?

A.
Ini Files

B.
Services

C.
Data Sources

D.
Environment

Explanation:
Environment Variable preference items allow you to create, update, replace, and delete user
and system environment variables or semicolon-delimited segments of the PATH variable.
Before you create an Environment Variable preference item, you should review the behavior
of each type of action possible with this extension.