You are the desktop administrator for your company's sales department. The IT manager for the sales department needs to distribute a custom application to the Windows XP Professional computers in the sales department. He deploys the software by using Group Policy. Susan is a user in the sales department. She reports that the custom application is not available. You examine her computer, and you verify that the application is not present on her computer. You want to ensure that the software is deployed the next time Susan logs on. Which command should you run?（）

A. Secedit /refreshpolicy user_policy /enforce
B. Secedit /refreshpolicy machine_policy /enforce
C. Gpupdate /target:computer /sync
D. Gpupdate /target:user /sync