Which of the following is a valid precaution you should take while working inside an iMac (27-inch, Mid 2010) system that is plugged into AC power but has not yet
been powered on?

A.
Do not turn the unit upside-down.

B.
Avoid putting your fingers near the fans.

C.
Make sure you are NOT wearing a grounded ESD wrist strap.

D.
Do not touch the processor heat sink because it could burn your fingers.