What is the difference between "real" and "imaginary" parts of a complex signal?

A) Real parts are always positive, while imaginary parts are negative.

B) Real parts represent amplitude, and imaginary parts represent phase.

C) Real parts correspond to the sine component, while imaginary parts correspond to the cosine component.

D) Real parts describe time behavior, while imaginary parts describe frequency behavior.

Answer: B) Real parts represent amplitude, and imaginary parts represent phase.

Explanation: In complex signal representation, the real part often corresponds to the amplitude component, while the imaginary part is associated with the phase, providing a complete description of the signal in the frequency domain.