The Diagram Below Shows That C₄ Plants Photosynthesize More Efficiently

The diagram below shows that C₄ plants photosynthesize more efficiently than C₃ plants at high temperatures.This is because

A) C₄ plants make use of chemosynthesis as well as photosynthesis.
B) C₄ plants are able to minimize water loss through the stomates more efficiently than C₃ plants.
C) C₄ plants make use of the Calvin cycle to photosynthesize over a wider range of hours, while C₃ plants do not.
D) C₄ plants have larger chloroplasts than C₃ plants.