Dwayne Johnson wants to run an appetitive Pavlovian conditioning experiment with a negative CS-US contingency condition as the control. He comes to you for advice. Which procedures do you suggest? Group of answer choices A 5-s tone predicts food pellets when the tone goes off; in separate sessions a 5-s click is played and food pellets are given, but they are always at least 60 s apart A 5-s tone predicts foot-shock when the tone goes off; in separate sessions a 5-s click is played and foot shocks are given, but they are always at least 60 s apart A 5-s tone predicts food pellets when the tone goes off; in a separate group the 5-s tone is played and food pellets are given, but they are always at least 60 s apart A 5-s tone predicts food pellets when the tone goes off; in separate sessions a 5-s click is played and food pellets are given at random