While Replacing the Coin Battery on the Motherboard, How Are

Multiple Choice

While replacing the coin battery on the motherboard, how are CMOS settings retained?

A) Replace the old battery with a new one within 30 seconds.
B) Flash the BIOS to create a backup copy of CMOS settings.
C) Change the boot sequence in the CMOS setup utility prior to changing the battery.
D) Leave the PC plugged into an AC outlet.