The alternative pathways of photosynthesis using the C₄ or CAM systems are said to be compromises.Why?

A)Each one minimizes both water loss and rate of photosynthesis.
B)C₄ compromises on water loss and CAM compromises on photorespiration.
C)Both minimize photorespiration but expend more ATP during carbon fixation.
D)CAM plants allow more water loss, while C₄ plants allow less CO₂ into the plant.
E)C₄ plants allow less water loss but CAM plants allow more water loss.