What Shift in Views Toward Sexuality Occurred in the Mid-1800s

What shift in views toward sexuality occurred in the mid-1800s?

A) People began seeing sexuality as something more continuous than dichotomous.
B) Society began condemning same-sex acts much more harshly than previously in history.
C) Explanations of sexuality began appealing to environmental rather than biological causes.
D) It became common to classify people into groups based on the sex of people they desire.