What makes Group Policy such a powerful tool is its ability to enable security administrators to:.

Enforce the organization's security policy

Explanation: Group policy provides a robust and centralized control to systems or computers on a particular network by providing a quick and efficient means of maintaining network security by affording network administrators the ability to several policies they wish to apply on users and computers in their network. This way the changes or policies can be applied to every computer on it's network. Hence it allows the network administrators to enforce the organization's security policy which may include restricting access to certain websites, directories, files or settings for all computers on the organization's network.

i think the answer is b.