If a Freely-Falling Object Were Somehow Equipped with a Speedometer

Multiple Choice

If a freely-falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s²,then its speed reading would increase each second by

A) 10 m/s.
B) 20 m/s.
C) 30 m/s.
D) 40 m/s.
E) depends on its initial speed