How Can We Tell That the Moon Is Held in Orbit

Multiple Choice

How can we tell that the Moon is held in orbit around Earth by a force?

A) The Moon follows a curved path as it orbits.
B) The Moon's gravity creates tides in Earth's oceans.
C) The Moon is always at the same distance from Earth.
D) One side of the Moon is always facing Earth.
E) Earth's gravitational force pulls inward on the Moon.