You Come Across a Magazine Article on Endorphins

You come across a magazine article on endorphins. It doesn't surprise you that it is subtitled "the keys to paradise," because

A) they have the capacity to alter a person's mood state.
B) these substances can reduce the addictive properties of illegal drugs.
C) of their pleasure-pain controlling properties.
D) many of the new prescription medications will have endorphins as their primary component.