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?

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

Check where the file originates from, and if it is a trusted source or his own document, click Enable Content.

Explanation:

A macro is a program that will perform a series of actions. This is especially useful to write a macro program in Word when some frequents actions are to be repeated from time to time. Hence, macro is not necessary be a malicious program and they can be written by user themselves. This is the reason when we see the warning "Macros have been disabled.”, we should check the source of the file and if it is from our trusted source or our own file, we can enable it to allow it to perform its function.  

i think its controle not shift

the answer is d underlined.