An employee is cooking a roast beef in the oven. What internal temperature must the roast reach for at least 4 minutes during the cooling process?

• A. 130 degrees
• B. 135 degrees
• C. 145 degrees
• D. 155 degrees

Answer: (C)

The main idea is that safety comes from the combination of temperature and time. For beef roasts, you don’t just aim for a high temperature; you must reach a specific internal temperature and keep it there long enough for the heat to pasteurize the meat. The standard safe target is 145°F, held for at least 4 minutes. That 4-minute period ensures enough heat exposure to reduce harmful bacteria to safe levels as the roast finishes cooking and begins to cool.

Temperatures like 130°F or 135°F are too low to provide the necessary lethality within the required timeframe, so they don’t meet the safety standard. A higher temperature like 155°F would also be safe, but it isn’t the minimal target the guideline specifies; 145°F for 4 minutes is the prescribed combination.