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

### Question:
What do earthquakes tell scientists about the history of the planet?

### Choices:
A. Earth’s climate is constantly changing.
B. The continents of Earth are continually moving.
C. Dinosaurs became extinct about 65 million years ago.
D. The oceans are much deeper today than millions years ago.

### Answer:
