Under Which Conditions Will Plant Cell Mitochondria Actively Oxidize Pyruvate

Under which conditions will plant cell mitochondria actively oxidize pyruvate and carry out oxidative phosphorylation?

A) only in photosynthetic cells in the light, while photosynthesis occurs concurrently
B) only in cells that store glucose in the form of starch and only in the dark
C) in all cells, with or without light
D) in photosynthesizing cells in the light, and in other cells in the dark