During Both CAM and C₄ Photosynthesis, What Is the Role

Multiple Choice

During both CAM and C₄ photosynthesis, what is the role of the PEP carboxylase enzyme?

A) to create ATP
B) to capture CO₂ in the form of HCO₃
C) to capture CO₂ in the form of 3-carbon organic acids
D) to capture CO₂ in the form of 4-carbon organic acids