4. Which of the following descriptions about Crassulacean acid metabolism (CAM) is NOT correct? (A) The benefit of CAM to the plant is the ability to leave most leaf stomata closed during the day. (B) During the night, CAM plants allow CO2 to enter and be fixed as organic acids. (C) During the day, the stomata of CAM plants close to conserve water, and the organic acids stored in the vacuoles of bundle sheath cells are released. (D) Pineapple is the economically valuable crop possessing CAM. (E) Cactus utilize the CAM as an adaptation for arid conditions.