Which of the following statements supports the claim that plants use a negative feedback system to conserve water during hot, dry weather?
A. The rate of photosynthesis falls off as the size of stomatal pores decreases.
B. Stomata are located on the underside of leaves in plants that inhabit arid environments.
C. Stomata open and close in response to light signals and are sensitive to blue light in particular.
D. The size of stomatal pore openings decreases as a function of humidity and soil hydration.
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