Select the correct statement that describes what you see in the plots: a. The signal, s(t), is distorted by the dramatic change in message frequency. b. The message amplitude change can be seen in the signal plot of s(t). When comparing plots for s(t) and m(t), it is obvious that the signal accurately represents the message. c. Both the message and carrier frequencies increase, therefore distortion will be experienced. d. The phase of the signal has shifted to the right, because AM techniques impact phase and amplitude.

AM modulation Carier 10 0 -5 -10 0 -5 0 tirme combined message and signal time Message 10 10 20 0 20 -5 10 time 10