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Above what ambient temperature does the two-hour rule shorten to one hour?

  • A.70 degrees Fahrenheit
  • B.100 degrees Fahrenheit
  • C.140 degrees Fahrenheit
  • D.90 degrees Fahrenheit

Answer: D

Correct answer: 90 degrees Fahrenheit

Above 90 degrees Fahrenheit ambient - a hot day, an outdoor buffet, a delivery vehicle in summer - the food warms towards the middle of the Danger Zone quickly and grows faster once there, so the allowance falls from two hours to one. The underlying reasoning is unchanged: the limit is set so that the population cannot reach a hazardous level in the time permitted.

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