Ron, a Middle-Aged Bank Executive, Is in Excellent Health

Ron, a middle-aged bank executive, is in excellent health. Ron jogs five miles four times a week, keeps his weight at a healthy point, and eats a well-balanced diet. He is particularly worried about the effects of aging as both his parents developed Alzheimer's disease in their later years. Recently Ron has been receiving Botox injections to reduce the wrinkles on his forehead. Little does he know that the Botox injections he receives and the aging disease he so dreads have this same neurotransmitter in common

A) serotonin
B) acetylcholine
C) dopamine
D) endorphins