What Was/were Mary Cover Jones's Main Finding(s) About Methods for Reducing

What was/were Mary Cover Jones's main finding(s) about methods for reducing or eliminating fear through counterconditioning?

A) Using direct conditioning, the fear-object was associated with a craving-object and the fear was replaced with a positive response.
B) Once the fears were set, it was impossible to eliminate them.
C) Using social imitation, children were able to reduce or eliminate their fear response.
D) None of the above is true.
E) Only a and c are true.