Frances puts a hungry rat into an experimental chamber. whenever the rat presses a lever, food falls into a tray. in about 30 minutes, the rat is pressing the lever steadily. frances returns the rat to the training cage for one hour a day every day until the rat produces young. frances then trains one of this rat's offspring in the same manner as its mother and repeats this procedure for several generations. you predict that when the twelfth generation rat is put into the training cage, it will press the lever steadily in about

1. three hundred fifty texans massacred goliad 2. the president who annexed texas tyler 3. a mission used as a fort san jacinto 4. dictator of mexico sam houston 5. texas william travis 6. commander of the texas army lone star republic 7. where santa anna was captured stephen austin 8. brought more than two thousand people to texas alamo 9. texan commander of the alamo santa anna

Cindy is 18 years old. cindy's parents and her 23-year old brother rich are going away for the weekend. renee, cindy's best friend, is pressuring her to throw a huge saturday night party for all their friends since no one will be home. renee even asked rich if he could pick up a few kegs for them. rich brought back two kegs of beer, a bottle of vodka, and a few bottles of wine, which he hid in the basement. renee also spread the word around school for everyone to show up. cindy now has over $100 worth of alcohol hid in the basement, an empty house for the weekend, and several friends expected to show. what should she do?

What film is responsible for the creation of the pg-13 rating?