PLEASE HELP ME PLEASE Under normal conditions, gases diffuse through small holes in the leaves of a plant. when the weather hot and dry, plants may close these openings to conserve water. how are the closures most likely to affect photosynthesis?

A.) They increase the rate of photosynthesis by increasing the amount of water in the leaf
B.) They have little or no effect on photosynthesis because gases do not take part in the process.
C.) they increase the rate of photosynthesis by increasing the amount of oxygen in the leaf
D.) they decrease the rate of photosynthesis by preventing carbon dioxide from entering the leaf
PLEASE HELP ME