The Kirkwood Gaps Are Caused by

The Kirkwood gaps are caused by

A) large asteroids moving in circular orbits within the asteroid belt, which sweep out and collect smaller objects in their path.
B) large asteroids whose orbits carry them periodically through the asteroid belt, where they sweep out a path and leave it devoid of asteroids.
C) the gravitational pull of Jupiter, which nudges asteroids into new orbits.
D) large asteroids on the outer fringe of the asteroid belt, which gravitationally affect the paths of smaller objects within the belt.