The Battery Indicator Light Is On, Even Though Your Laptop

The battery indicator light is on, even though your laptop is plugged into an AC adaptor.
To determine why you are not getting power from the AC adapter, which of the following should you check? (Select all that apply.)

A) Whether the battery is connected properly to the laptop.
B) Whether the AC adapter is plugged into a live electrical outlet.
C) Whether the AC adapter is connected properly to the laptop.
D) Whether the DC jack is loose.