JBWatson Suggested That People Learn Phobias by Pairing a Stimulus

J.B.Watson suggested that people learn phobias by pairing a stimulus with an unpleasant experience.What is evidence against that hypothesis?​

A) Phobias are more common in young adulthood than in old age.
B) ​Most phobias can be traced to repressed memories from early childhood.
C) ​Phobia of harmless objects is more common than phobia of something dangerous.
D) ​Phobia of snakes is more common than phobia of cars.