​The Major Breakthrough That Allowed Women to Join the Sexual

​The major breakthrough that allowed women to join the sexual revolution was

A) that sex outside of marriage became more acceptable for men and women.
B) the postponement of marriage by women who increasingly went to college.
C) the acceptance of bachelorhood as a viable alternative for men, thus freeing women from marriage at a young age.
D) the advent of birth control, which freed women from the connection between sex and conception.
E) None of these are correct.