Final answer:
The correct answer is option d) To reduce cognitive dissonance.
Step-by-step explanation:
George feels the need to justify his behavior because he is experiencing cognitive dissonance. Cognitive dissonance is the psychological discomfort that arises from a conflict in a person's behaviors, attitudes, or beliefs that runs counter to one's positive self-perception.
In this case, George's negative behavior towards Hannah conflicts with his positive self-perception and belief that he is a good person. To reduce this cognitive dissonance, George justifies his behavior by blaming Hannah for not helping him with his homework, thus shifting the responsibility away from himself.