HOTSPOT
Your network contains an Active Directory domain named adatum.com. All domain controllers run Windows Server 2012 R2. All client computers run Windows 7. The computer accounts for all of the client computers are located in an organizational unit (OU) named OU1. An administrator links a Group Policy object (GPO) to OU1. The GPO contains several application control policies. You discover that the application control policies are not enforced on the client computers. You need to modify the GPO to ensure that the application control policies are enforced on the client computers.
What should you configure in the GPO? To answer, select the appropriate service in the answer area.
Answer: 
Explanation:
Does AppLocker use any services for its rule enforcement?
Yes, AppLocker uses the Application Identity service (AppIDSvc) for rule enforcement. For AppLocker rules to be enforced, this service must be set to start automatically in the GPO.
Before you can enforce AppLocker policies, you must start the Application Identity service by using the Services snap-in console.
Membership in the local Administrators group, or equivalent, is the minimum required to complete this procedure.
To start the Application Identity service