Masters and Johnson described four stages of

A) prenatal sexual development.
B) sexual dysfunction.
C) the sexual response cycle.
D) sexual orientation.

Sexual Response Cycle

The sequence of physical and emotional changes that occur as a person becomes sexually aroused and participates in sexually stimulating activities.

Masters And Johnson

Pioneering sex researchers who conducted groundbreaking studies on human sexual response and sexual disorders from the late 1950s through the 70s.