Question

Which kind of signal does a cell phone use to send a picture through a text message?
A. a digital signal, which is less likely to degrade
B. an analog signal, which is able to travel large distances
C. a digital signal, which prevents images from being pixelated
D. an analog signal, which can easily be encoded and decoded

Answer 1

A. a digital signal, which is less likely to degrade

Modern cell phones send pictures as digital data (bits). Digital signals are more resistant to noise and degradation than analog, so the image can be recovered accurately.