33. Which of the following is most likely to occur in a leaf cell of a CAM plant during the day?
(A) Entry of CO₂ through stomata
(B) Exit of water through stomata
(C) Decarboxylation of malic acid
(D) fixation of CO₂ by PEP carboxylase
(E) Conversion of oxaloacetate to malate

題目解析這道題目考察的是CAM植物（...