Which of the Following Statements Best Describes John Watson's Belief

Which of the following statements best describes John Watson's belief in the power of conditioning?

A) Regardless of inborn traits, people can be trained to shape their behavior through conditioning.
B) It is a powerful tool in shaping behavior but it cannot change the effects of inborn tendencies.
C) Conditioning is useful for treating people with phobias, but only a few phobias can be treated through conditioning.
D) It is an effective tool for modifying behavior although personal differences are an important factor.