Question: Preheat an oven to 315 degrees

  Options: 
 A. Open the oven door, make sure nothing is inside the oven such as pots, slide the oven knob and turn right using your fingers,until you are on the 315, remove your fingers, let oven heat for 15 minutes
 B. Open the oven door, make sure nothing is inside the oven such as pots, push in the oven knob and turn right using your fingers,until you are on the 315, remove your fingers, let oven heat for 15 minutes
Answer: B