Standard Photosynthesis (C₃) Plants Are More Susceptible to Photorespiration Than

Standard photosynthesis (C₃) plants are more susceptible to photorespiration than either C₄ or CAM plants. Why do most plants lack the C₄ pathway?

A) because rubisco is more efficient in C₃ plants when compared to rubisco in C₄ and CAM plants
B) because C₄ and CAM pathways have an energetic cost that makes them advantageous in only very hot and/or arid environments
C) because photorespiration is not a serious problem for most plants
D) because most plant species do not have vacuoles in their cells to store the malate generated from CO₂ taken in during the night