The Numerous Craters We See on the Solid Surfaces of So

The numerous craters we see on the solid surfaces of so many Solar System bodies are evidence that ______________________.

A) they were so hot in their youth that volcanoes were widespread
B) the Sun was so hot that it melted all these bodies and made them boil
C) these bodies were originally a mix of water and rock. As the young Sun heated up, the water boiled, creating hollow pockets in the rock
D) they were bombarded in their youth by many solid objects
E) all the planets were once part of a single, very large and volcanically active mass that subsequently broke into many smaller pieces