Which of the following statements is TRUE regarding the appropriate steps which should be taken when preparing to clean a CRT monitor?

A.
You should leave the monitor on whilst applying a warm water rag soaked and cleaning the monitor.

B.
You should ensure you have unplugged the cable going to the graphics card.

C.
You should first ensure that you have unplugged the monitor.

D.
You should leave the monitor plugged in when spraying the screen with household based cleaner.