14. Under what conditions do photosynthesis and cellular respiration occur in plants? (A) Photosynthesis and cellular respiration occur oniy in the light (B) Photosynthesis occurs only in the light, and cellular respiration occurs only in the dark. (C) Photosynthesis occurs only in the light, and cellular respiration occurs in both the dark and the light. (D) Photosynthesis and cellular respiration occur in both the light and the dark.