James took two pea plants, placing one in a dark closet and the other on a sunny windowsill. Both are located in air-conditioned rooms. He then measured the growth of the pea plants after a week. Which of the following best describes the purpose of this experiment? A
To determine the effect of air conditioning on plant growth
B
To determine the effect of lack of water on plant growth
C
To determine the effect of sunlight on plant growth
D
To determine the effect of enclosed spaces on plant growth
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