Question

As an emergency vehicle approaches Bob and moves away from Jill, how does the actual frequency of the siren change? A) As an emergency vehicle approaches Bob the frequency increases. B) As an emergency vehicle moves away from Jill the frequency decreases. C) The actual frequency of the siren does not change despite appearances. D) Bob does not notice any change until the vehicle passes him and the siren increases.

Answer 1

Answer:

the answer is actualy C i did it on usatestprep

Explanation: