Question: how to preheat an air fryer

  Options: 
 A. The preheating of the airfryer takes about 2-3 minutes. With the Philips Viva Airfryer, the timer button lets you preheat the device by adjusting the timer to five minutes and waiting until the warm-up light comes on and blows the bulb. Fill the basket after that and turn the timer knob to the required cooking time.
 B. The preheating of the airfryer takes about 2-3 minutes. With the Philips Viva Airfryer, the timer button lets you preheat the device by adjusting the timer to five minutes and waiting until the warm-up light goes out. Fill the basket after that and turn the timer knob to the required cooking time.
Answer: B