During the servicing of a desktop PCI card, which of the following may cause the motherboard to short out? (Select TWO).

A.
Power is still supplied to the system.

B.
PCI plug-n-play is disabled in the BIOS.

C.
An anti-static wrist strap is not utilized.

D.
A fan becomes dislodged and the system cannot cool properly.

E.
The PCI card is installed in a different slot and the original slot is not covered.