Final answer:
To ensure food is safely cooked, a digital instant-read thermometer should be used for accurate and rapid temperature readings of the food's interior. Other thermometers like dial or infrared are either not as precise or are unsuitable for this purpose.
Step-by-step explanation:
The only way to ensure food has been cooked to a safe internal temperature is through the use of a digital instant-read thermometer (d).
These thermometers are designed to provide a quick and accurate reading of the food's internal temperature, which is crucial for food safety. Dial thermometers, while common, do not provide as rapid a reading and may not be as precise.
Thermocouple thermometers are more complex and not as widely used for general cooking. Infrared thermometers, such as pyrometers, measure surface temperatures and are not suitable for determining the internal temperature of food.
When cooking food, especially meat, it is essential to reach specific internal temperatures to kill any harmful bacteria. For example, a good pressure cooker can reach temperatures as high as 252°F (122°C), cooking food much faster.
Thermometers must be able to measure temperature accurately according to the Fahrenheit, Celsius, or Kelvin scales. The Fahrenheit scale is commonly used in recipes and temperature guidelines in the United States.
correct option d) Digital instant-read thermometer.