If the computer is experiencing any power issue, such as not starting up, not displaying video, sleep issues, or fan noise issues, which of the following would help
further isolate the issue?

A.
Reinstall OS X

B.
Reset the System Management Controller (SMC)

C.
Reset NVRAM

D.
Startup in Safe Mode

Explanation:
Resetting the SMC can resolve some computer issues such as not starting up, not displaying video, sleep issues, fan noise issues, and so forth. If your computer
still exhibits these types of issues after you’ve restarted the computer, try resetting the SMC.