One Way Rational Emotive Behavioral Therapy Is Effective in a Group

One way Rational Emotive Behavioral Therapy is effective in a group setting is that the ABC's (an REBT approach) of participant problems are easily exhibited. What does the acronym ABC stand for when pertaining to Rational Emotive Behavioral Therapy?

A) Assumption, irrational belief, and consequences
B) Assumed belief, irrational belief, and contradiction
C) Activating event, basic assumption, and consequences,
D) Activating event, irrational belief, and consequences