In 1994,Hernstein and Murray Published a Controversial Book Called the Bell

In 1994,Hernstein and Murray published a controversial book called The Bell Curve.Why was this book so controversial?

A) The authors questioned the effectiveness of Head Start programs for disadvantaged youth.
B) The authors recommended an overhaul of affirmative action policies.
C) The authors argued that intelligence is the most important predictor of many positive and negative outcomes.
D) all of the above