You are opening old project schedule in Microsoft Office Project Standard 2007. The Project files have been customized to prompt you for your username before opening, so Project can log your actions. When you open the files, you notice that the prompt does not appear and logging does not take place. You need to restore the functionality in the files. What should you do?

A.
Change the file extension to .mcr.

B.
Decrease the macro security level to Medium.

C.
Set the macro security level to allow only macros installed in trusted locations.

D.
Activate the Allow loading files with legacy or non default file formats option.