Consider a Plant Growing in Well-Watered Soil and High Light

Consider a plant growing in well-watered soil and high light in a small glass chamber. How will the plant respond if you exhale repeatedly into the chamber?

A) stomata will close even as photosynthesis increases
B) stomata will close and so photosynthesis declines
C) stomata do not respond, but photosynthesis increases
D) stomata will open in response to O₂ buildup