Verified Answer :

  • Food safety guidelines established by the USDA and FDA mandate that leftovers, such as gravy, be reheated to a minimum internal temperature of \(165^\circ\text{F}\) (\(74^\circ\text{C}\)) to ensure bacteria are destroyed.
  • Temperatures lower than this range allow harmful bacteria to potentially survive and multiply, creating a risk of foodborne illness.
  • Among the options provided, \(165^\circ\text{F}\) (\(74^\circ\text{C}\)) is the correct minimum standard for reheating.
  • The final answer is \(\boxed{165^\circ\text{F} \ (74^\circ\text{C})}\).

Explanation

  1. Food Safety Standards for Reheating Leftovers

The problem asks for the minimum internal temperature to which gravy should be reheated when using a microwave oven to ensure it is safe for consumption. Food safety regulations, such as those provided by the USDA and FDA Food Code, establish specific temperature requirements for reheating potentially hazardous foods to prevent the growth of harmful bacteria. According to these guidelines, any leftovers, including gravy, that are being reheated must reach a minimum internal temperature of \(165^\circ\text{F}\) (\(74^\circ\text{C}\)) for at least 15 seconds. This temperature is necessary to effectively kill bacteria that may have proliferated while the food was being stored.

  1. Comparing Requirements to Provided Options

Comparing the standard safety requirement of \(165^\circ\text{F}\) (\(74^\circ\text{C}\)) with the provided choices:

A\(70^\circ\text{F}\) (\(21^\circ\text{C}\)) - This is well within the temperature danger zone, where bacteria grow rapidly.
B\(135^\circ\text{F}\) (\(57^\circ\text{C}\)) - This is often a minimum temperature for hot holding, but not for initial reheating of leftovers.
C\(165^\circ\text{F}\) (\(74^\circ\text{C}\)) - This matches the required temperature for safety.
D\(180^\circ\text{F}\) (\(82^\circ\text{C}\)) - This is higher than necessary, though safe, it is not the minimum requirement.

Therefore, option c is the correct choice.

  1. Conclusion

The minimum internal temperature to which gravy should be reheated is \(\boxed{165^\circ\text{F} \ (74^\circ\text{C})}\), which corresponds to option c.

Examples

Food safety is critical in daily life. For instance, when you prepare a large batch of homemade gravy for a dinner party and have leftovers, knowing the correct reheating temperature ensures that you can safely enjoy the meal again the next day. By reheating your leftovers to at least \(165^\circ\text{F}\) (\(74^\circ\text{C}\)), you protect yourself and your family from foodborne illnesses, making it a simple yet vital habit for kitchen hygiene.

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