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

### Question:
The rate of growth for a species of grass was measured in a treeless yard and tree-shaded yard. The grass grew twice as fast in the treeless yard. Which factor most likely contributed to the difference in growth rate?

### Choices:
A. amount of animals
B. amount of light
C. amount of soil
D. amount of rain

### Answer:
