Nolan attempted to open a Word document that contains a macro and received a security warning stating, "Macros have been disabled." The warning contains the button "Enable Content."

What should he do?

A. Close it immediately and delete the file,
B. Check where the file originates from, and if it is a trusted source or his own document, click Enable Content,
C. Close the file and right-click and rename it before opening it again,
D. Keep the file open and save it with a different file name, disabling the warnings.