20 POINTS! please help!

Many people rely on cell phones to send and receive information, phone calls, text messages, photos, and videos.
Which statement best describes how cell phones work?
A: Cell phones send sound and visible light waves through the air to transmit the sounds
and images.
B: Cell phones use electric power lines to transmit information as digital signals.
C: Cell phones transmit information via alpha particles.
D: Cell phones convert information into digital signals which are transmitted using microwaves. The receiving cell phone converts this signal back to usable information.