Which Statement Best Explains Why Tropical Plants May Lose Function

Multiple Choice

Which statement best explains why tropical plants may lose function at temperatures as high as 10°C, while alpine plants can function at temperatures close to freezing?

A) The enzymes of tropical plants become denatured at 10°C, whereas the enzymes of alpine plants do not.
B) The membranes of alpine plants have a higher proportion of unsaturated lipids, making them less sensitive to lower temperatures.
C) The metabolic coordination of alpine plants makes them able to withstand lower temperatures.
D) The alpine plants can function even when their membranes have solidified, whereas the tropical plants cannot.