Final answer:
The light-dependent reactions of photosynthesis generate ATP and NADPH, which are used to power the light-independent reactions. Hence the correct answer is option A
Step-by-step explanation:
The light-dependent reactions of photosynthesis generate ATP and NADPH. These energy-carrying molecules are produced during the first stage of photosynthesis and are used to power the light-independent reactions, where carbon dioxide is fixed and sugars are made.
Hence the correct answer is option A