34. How might a plant respond to severe flooding? (A) It increases ethylene production which causes apoptosis in root cells. (B) It increases the proportion of unsaturated fatty acids in cell membranes to reduce their fluidity. (C) It reduces transpiration and closes the stomata. (D) It produces heat-shock proteins that may protect the plant’s proteins from denaturing. (E) It orients leaves toward the sun to increase evaporative cooling.