The Most Significant Problem with the Behavioral Theory of Phobias

The most significant problem with the behavioral theory of phobias is that:

A) most phobias do not have an evolutionary basis and are not part of our collective unconscious.
B) phobias should disappear once the conditioned stimulus is no longer paired with the unconditioned stimulus.
C) many people with phobias cannot identify traumatic events that triggered them.
D) observational learning helps in the maintenance of phobias more than operant conditioning.