You have decided to do a science fair project involving plants. Which of the following represents a well-stated hypothesis?

A. if I vary the amount of sunlight then the plant will be affected.

B. if my plant stays in my locker for 4 weeks then my locker will smell better.

C. if the amount of sunlight is decreased then the growth rate will also decrease.

D. the amount of sunlight each plant receives will directly affect the overall growth rate.