Answer:
c. Explanation below.
Explanation:
A, B, and D are wrong. Because that does not happen in the stroma.
C is the only answer that makes sense. When the guard cells of the stroma are full of water, the weight of the water being blocked pushes through.
I hope this cleared things for you, please mark my answer brainliest. If you need more info watch some videos, they might help you understand better.
