Which Misconception Did Masters and Johnson Disprove?​

Which misconception did Masters and Johnson disprove?​

A) Sigmund Freud had argued that mature women have only vaginal orgasms.
B) ​Previous researchers had emphasized genetics as an explanation for sexual orientation.
C) ​Previously, psychiatrists had overestimated how many women have multiple orgasms.
D) ​Previous researchers had overestimated the variability of human sexual behavior.