which of the following actions will you not take before beginning installation or removal of anyNON-PNP hardware device inside the computer case?（）

• A、Place all the hardware components in static proof bags.
• B、Remove all the jumpers from the motherboard.
• C、Switch off the main power and remove the power cord
• D、Use an anti-static wrist strap.
• E、Turn off the computer.
• F、Place the computer on the anti-static mat