Which of the Following Approaches to Treating a Phobia Is/are

Which of the following approaches to treating a phobia is/are CORRECTLY matched with the type of learning it reflects?

A) Conditioning client to associate a response of relaxation rather than anxiety to the feared object - observational learning
B) Reinforcing client directly by interacting with the feared object - operant conditioning
C) Exposing client to a model interacting successfully with the feared object - classical conditioning
D) A new behavior is learned but not demonstrated until some incentive is provided for displaying it - perceptual learning