B
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
The surface of the Moon is covered with craters. Most of these craters were formed by

### Choices:
A. eruptions of active volcanoes
B. the impacts of many meteoroids
C. shifting rock on the Moon's surface ("moonquakes")
D. tidal forces caused by the Earth and Sun

### Answer:
