One Reason That Psychologists Abandoned the View of Instinct as a Universal

One reason that psychologists abandoned the view of instinct as a universal explanation of human behavior is that

A) Freud's popular theory rejected the importance of instinct.
B) there had been little success in generating a list of human instincts.
C) the behaviorist influence began to diminish in the 1920s.
D) cross-cultural studies found enormous behavioral variation.