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.
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.