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

### Question:
A student hypothesizes that the amount of water a plant receives will affect how long it grows before reaching maturity. To test this hypothesis, the student will need

### Choices:
A. several digital scales.
B. a wet paper towel.
C. several identical plant seeds.
D. different sizes of containers.

### Answer:
