Your network contains an Active Directory domain. All domain controllers run Windows Server  2008 R2. Client computers run either Windows XP Service Pack 3 （SP3） or Windows Vista.    
You need to ensure that all client computers can apply Group Policy preferences.    
What should you do（）

Your network contains a single Active Directory domain. All client computers run Windows Vista  Service Pack 2 （SP2）.    
You need to prevent all users from running an application named App1.exe.    
Which Group Policy settings should you configure（）

Your network contains an Active Directory forest.    
You add an additional user principal name （UPN） suffix to the forest. You need to modify the UPN  suffix of all users.    
You want to achieve this goal by using the minimum amount of administrative effort.    
What should you use（）

Your network contains an Active Directory forest. The functional level of the forest is Windows  Server 2008 R2.    
Your company’s corporate security policy states that the password for each user account must be  changed at least every 45 days.    
You have a user account named Service1. Service1 is used by a network application named  Application1. Every 45 days， Application1 fails. 
After resetting the password for Service1， Application1 runs properly. You need to resolve the  issue that causes Application1 to fail. The solution must adhere to the corporate security policy.    
What should you do（）