Which of the following statements best describes the conditions under which the Calvin cycle and cellular respiration occur in plants?

A) The Calvin cycle and cellular respiration both occur only in the light.
B) The Calvin cycle occurs only in the light, and cellular respiration occurs only in the dark.
C) The Calvin cycle occurs only in the dark, and cellular respiration occurs in both the dark and the light.
D) The Calvin cycle and cellular respiration both occur in the dark and the light.