How do ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis?

The light-dependent reactions capture light energy and produce ATP and NADPH. The light-independent reactions, also called the Calvin cycle, use ATP for energy and NADPH to help reduce carbon dioxide into sugars. Therefore, ATP and NADPH are produced in the light-dependent reactions and used in the light-independent reactions, as choice C states.

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