What Was a Major DIFFERENCE Between Heterosexual and Lesbian Couple

What was a major DIFFERENCE between heterosexual and lesbian couple interactions found by Masters and Johnson?

A) A greater emphasis on breast stimulation in heterosexuals than in lesbians.
B) A greater emphasis on breast stimulation in lesbians than in heterosexuals.
C) A teasing technique among lesbians in which breast stimulation was stopped just prior to orgasm.
D) More frequent genital stimulation than breast stimulation among lesbians as compared with heterosexuals.