Step 1: Understanding the Question:
The question asks for the full form of the letters A, B and C used in Rational Emotive Therapy. This is a recall question about the therapy of Albert Ellis.
Step 2: Recall the idea behind the model:
Ellis said that a happening (A) does not directly cause the feeling (C). The person's belief (B) about the happening sits in between and decides the feeling. Changing irrational beliefs is the main work of the therapist.
Step 3: Test each option against this idea:
The first letter must be the event that triggers the reaction, so it has to be an antecedent. The second letter must be the thought about the event, so it has to be a belief. The third letter is the result, so it is the consequence.
Step 4: Reject options (1) and (2).
Options (1) and (2) start with application and analysis. Neither word names a trigger event, and both keep behaviour in the middle, where RET puts belief. Both are wrong.
Step 5: Reject option (4).
Option (4) lists affect, behaviour and cognition. These are the feeling, action and thought parts of an attitude. They are unrelated to Ellis's model, so option (4) is wrong.
Step 6: Select the match.
Only option (3), antecedent-belief-consequence, fits all three roles.
Final Answer:
The correct expansion is Antecedent-belief-consequence, option (3).