The Distinction Between the "Vaginal" and the "Clitoral" Orgasm Is

The distinction between the "vaginal" and the "clitoral" orgasm is based on

A) research showing the different physiological measures of orgasm intensity depending on whether it was a result of vaginal or clitoral stimulation.
B) outdated,biased ideas of sexual fulfillment and female maturity.
C) the basic physiology of the female where sexual stimulation is much more erotic and physically effective when done in the act of intercourse.
D) the assumption that the vagina is the trigger to orgasm and not the clitoris.