In 1969, Neil Armstrong became the first person to walk on the Moon. Video coverage
showing the astronaut walking on the surface of the Moon gives the impression that he was
bouncing while he walked. What is the reason for this? *

A. The astronaut's mass on the Moon decreases.

B. The density of the astronaut on the Moon is higher than on Earth.

C. The atmosphere of the Moon affects the way the astronaut is able to move.

D. The astronaut's weight on the Moon depends on the Moon's gravitational force.