You need to ensure that User1 can save and edit documents on the client computer by using office

Your company subscribes to an Office 365 Plan E3. A user named User1 installs Office Professional
Plus for Office 365 on a client computer. From the Microsoft Online Services portal, you assign User1
an Office Professional Plus license. One month after installing Office, User1 can no longer save and
edit Office documents on the client computer. User1 can open and view Office documents.
You need to ensure that User1 can save and edit documents on the client computer by using office.
What should you do?

A.
Install the Office Customization Tool.

B.
Reinstall Office Professional Plus.

C.
Install the Microsoft Online Services Sign-in Assistant.

D.
Upgrade the subscription to Plan E4.

Explanation:

http://technet.microsoft.com/en-us/library/gg702619(v=office.15).aspx