When NADH or NADPH transfers electrons to a recipient molecule, the recipient becomes reduced and the activated carriers are oxidized (to NAD or NADP +, respectively). What else happens during this reaction? Choose one: A. A proton is released into the solution. B. A phosphate group is transferred to the recipient molecule. C. A molecule of water is released into the solution. D. A proton is taken up by the carrier. E. A proton is taken up by the recipient molecule..