What Is the Primary Difference Between NAD⁺ and NADP⁺

What is the primary difference between NAD⁺ and NADP⁺?

A) Both function as electron carriers, but NADP⁺ has a third phosphate group and NAD⁺ does not.
B) NAD⁺ functions as an electron transporter, whereas NADP⁺ does not.
C) Both transport electrons to the electron transport chain (ETC) found on the inner mitochondrial membrane, but NADP⁺ transfers its electrons to the ETC at a higher energy level.
D) NAD⁺ functions as an electron transporter in chloroplasts while NADP⁺ functions as an electron transporter in mitochondria.