The power supply of your computer lists these specifications on the label:
100-120V ~ / 4.0A
220-240V ~ / 2.0A
What does this information mean?
A) The power supply can support both 100-120V DC and 220-240V DC power sources.
B) The power supply can support both 100-120V AC and 220-240V AC power sources.
C) The power supply uses 4 amps of power when using a 220-240V AC power source.
D) The power supply uses 2 amps of power when using a 110-120V DC power source.