Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` levels because
A. Effective pumping of `CO_(2)` into bundle sheath cells
B. `RuBisCO` in `C_(4)` plants has higher affinity for `CO_(2)`
C. Four carbon acids and primary initial `CO_(2)` fixation products
D. Primary fixation of `CO_(2)` is mediated via PEP carboxylase.
