Of the Following Individuals, Who Would Be the Most Likely

Of the following individuals, who would be the most likely to benefit from behaviour modification techniques based on operant conditioning?

A) Marcia, who suffers from delusions and hallucinations
B) Jacques, who would like to gainsightto his childhood traumas
C) Five-year-old Valerie, who has frequent temper tantrums
D) Douglas, who is afraid to fly