Your network contains an Active Directory domain named contoso.com. All domain controllers run Windows Server 2012 R2. A

[answerhappygod]

Your network contains an Active Directory domain named contoso.com. All domain controllers run Windows Server 2012 R2.
An organizational unit (OU) named OU1 contains 200 client computers that run Windows 8 Enterprise. A Group Policy object (GPO) named GPO1 is linked to
OU1.
You make a change to GPO1.
You need to force all of the computers in OU1 to refresh their Group Policy settings immediately. The solution must minimize administrative effort.
Which tool should you use?

A. The Secedit command
B. Group Policy Management Console (GPMC)
C. Server Manager
D. The Gpupdate command
E. Active Directory Users and Computers