What Is the Relationship Between the Kirkwood Gaps in the Asteroid

What is the relationship between the Kirkwood gaps in the asteroid belt and the Cassini division in the rings of Saturn?

A) Both the Kirkwood gaps and the Cassini division are caused by large objects passing through swarms of smaller objects, sweeping out gaps in the swarms.
B) Both the Kirkwood gaps and the Cassini division were discovered by observers from the same group; Kirkwood and Cassini both worked at the same observatory.
C) Both the Kirkwood gaps and the Cassini division are caused by disruptions of the orbits of small objects by larger planets or moons. In both cases, the orbital distance of small objects in the gaps is related by simple fractions to the orbital distance to the disturbing object.
D) Both the Kirkwood gaps and the Cassini division are caused by disruptions of the orbits of small objects by larger planets or moons. In both cases, the periods of the small objects are simple fractions of those of the larger disturbing object.