In General, Large Bodies in the Solar System Show Less

In general, large bodies in the solar system show less evidence of cratering than do small bodies. Why should we expect this correlation?

A) The gravity of large bodies deflects incoming projectiles and thus there are fewer collisions.
B) Large bodies are more likely to retain an atmosphere, and thus most large projectiles burn up before striking the ground.
C) Large bodies actually receive more hits because of their larger size, but later craters obliterate earlier ones, and we only see evidence of the most recent.
D) Large bodies cool more slowly and are more likely to retain internal heat and be geologically active, capable of resurfacing the planet and obliterating craters.