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

### Question:
How do the sprouts of seeds buried in complete dark in the soil find their way to the surface of the soil?

### Choices:
A. They grow toward light.
B. They grow toward surface warmth.
C. They grow opposite the direction of the bedrock.
D. They grow opposite the direction of the pull of gravity.

### Answer:
