You are a desktop support technician for your company. All client computers run Windows XP Professional with Service Pack 2 (SP2) and are part of a domain.

Two users in the research department report that one of their testing applications no longer functions. You discover that an administrator configured security on the computers in the research department by applying a new security template. You verify that all the other users in the research department can run their testing applications.

You need to find out why the two users cannot run the testing application.
What should you instruct the users to do?

A.
Run the gpupdate command on their computers.

B.
Run the gpedit.msc command on their computers.

C.
Run the netdiag command on their computers.

D.
Run the gpresult command on their computers.