What Was the Radically New View of Sexual Orientation Proposed

What was the radically new view of sexual orientation proposed by Alfred Kinsey in the 1940s?

A) Sexual orientation exists on a continuum from exclusively heterosexual to exclusively homosexual.
B) Sexual orientation is mainly influenced by nature rather than nurture.
C) Sexual orientation should be measured separately for me and women to avoid sample bias.
D) Sexual orientation of men and women are often determined by the sizes of their brains.