An Earth satellite in orbit emits a radio signal of constant frequency. Compared to the emitted frequency, the frequency of the signal received by a stationary observer will appear to be:
Ahigher as the satellite approaches
Bhigher as the satellite moves away
Clower as the satellite approaches
Dunaffected by the satellite's motion
Ahigher as the satellite approaches
Bhigher as the satellite moves away
Clower as the satellite approaches
Dunaffected by the satellite's motion