Plants make ATP during the light reactions of photosynthesis. Why do they also need to carry out the process of cellular respiration?

A) The ATP made is photosynthesis is different from the ATP made in cellular respiration.
B) The ATP made is photosynthesis is only enough to fuel the light reactions. The plant has to carry out cellular respiration to make large amounts of ATP.
C) Plants need to make ATP from cellular respiration only when the conditions for photosynthesis are bad.
D) Plants do not ever need to perform cellular respiration.