In the Late 1800s,oral Sex or Stimulation of Genitals Orally

In the late 1800s,oral sex or stimulation of genitals orally was a taboo and viewed as a shameful act.Today,most of the population indulges in oral sex and it has become an acceptable behavior.According to Leonore Tiefer,the act of oral sex is a

A) statistically "normal" behavior.
B) subjectively "normal" behavior.
C) idealistically "normal" behavior.
D) culturally "normal" behavior.