quiz 4dCan you quickly pick the real four-dimensional shapes while avoiding the decoys? Test your knowledge on this just for fun quiz and compare your score to others. Quiz by4D module reinforcement quiz. Save. 5.0 (1 review) Flashcards; Learn; Test; Match; Get a hint. what is a potential problem with using candy as a reinforcer? unhealthy. 1 4. 1 4.