PLEASE ANSWER THIS ASAP!!!
Oliver was listening to music streaming from a cell phone. The sound was clear with no interference until he entered a garage and went down to the 4th level for parking. Then, the music stopped playing entirely.

Is the music signal most likely an analog or digital signal, and how do you know?


(Choice A)
Analog because the music was always clear until it stopped playing.

(Choice B)
Digital because the music was always clear until it stopped playing.

(Choice C)
Analog because the signal reaches into the parking garage.

(Choice D)
Digital because the signal reaches into the parking garage.