Final answer:
The incorrect statement about light-dependent reactions is that they use carbon dioxide to make ATP; this actually happens during the light-independent reactions.
Step-by-step explanation:
The statement about light-dependent reactions that is not true is C.) It uses carbon dioxide to make ATP. In the process of photosynthesis, light-dependent reactions indeed require sunlight (A) and water molecules are broken apart (B) to produce oxygen, ATP, and NADPH. However, it is during the light-independent reactions, also known as the Calvin Cycle or 'dark' reactions, that carbon dioxide is fixed into organic sugar molecules using the ATP and NADPH generated from the light-dependent reactions. Oxygen is released as a byproduct (D) during the light-dependent reactions when water is split.