Early in His Career, Sigmund Freud Changed His Position with Regard

Early in his career, Sigmund Freud changed his position with regard to

A) whether psychological problems stem from early sexual abuse or fantasies about early sexual abuse.
B) whether the primary human motivation is sex or striving for superiority.
C) how many stages of sexual development are normal during childhood development.
D) the probable brain locations of the id, ego, and superego.