Which of the following represents a good, controlled experiment?
frank hypothesized that warmer temperatures would make his tomatoes produce fruit sooner. he gathered 50 tomato plants and put them in identical pots. he raised the temperature in the tomato room and watched to see when they would produce tomatoes.

Steven spielberg's classic movie jaws was a thriller about a great white shark that terrorized tourists at a local beach. just before the shark's appearance, eerie music began playing. as the unseen shark came closer, the tempo of the music picked up. after the audience had experienced this a few times, the sound of the music triggered the emotional reaction of fear in the audience even though the shark still had not appeared. at that point, the sound of the eerie music was a: a) unconditioned response (ucr) b) conditioned response (cr) c) conditioned stimulus (cs) d) unconditioned stimulus (ucs)