Light-dependent reactions result in the reduction of nicotinamide adenine dinucleotide phosphate (NADP+). This occurs when NADP+ gains electrons (and usually protons) to become NADPH, which is then used in the Calvin cycle during the light-independent reactions of photosynthesis.
However, since "reduction" is not one of the options presented, the best fit from the given choices would be use, as NADP+ is utilized in the process to produce NADPH.