Photosynthesis ceases when leaves wilt,mainly because

A)the chlorophyll in wilting leaves is degraded.
B)flaccid mesophyll cells are incapable of photosynthesis.
C)stomata close, preventing CO₂ from entering the leaf.
D)photolysis, the water-splitting step of photosynthesis, cannot occur when there is a water deficiency.
E)accumulation of CO₂ in the leaf inhibits enzymes.