Mauro has a project for his ap® psychology class. he wants to show that studying using flashcards is an effective study technique. his teacher allows him to make a presentation about mental illness in teenagers to her first period class and her fifth period class. mauro has the first period class make flashcards and gives them time to study them, but the fifth period class does not make flashcards. then he gives both classes a quiz. the fact that the first period class is before lunch and the fifth period class is after lunch is