$\mathrm{C}_{4}$ photosynthesis
a. is the same as $\mathrm{C}_{3}$ photosynthesis, because it takes place in chloroplasts.
b. occurs in plants whose bundle sheath cells contain chloroplasts.
c. takes place in plants such as wheat, rice, and oats.
d. is an advantage when the weather is hot and dry.
e. Both b and d are correct.