Question

what effect does noise have on different types of signals?
a. it distorts digital signals, making them unreliable.
b. noise prevents the transmission of both analog and digital signals.
c. it distorts analog signals, making them unreliable.
d. noise has no effect on either analog or digital signals.

Explanation:

Analog signals are continuous - valued and noise can distort their amplitude, frequency, or phase, leading to unreliability. Digital signals have discrete values and can use error - correction techniques to mitigate noise effects to some extent. Noise doesn't prevent the transmission of signals but rather degrades their quality.

Answer:

C. It distorts analog signals, making them unreliable.