Carmen is heating some water and trying to measure the temperature of water using a Celsius thermometer. Which measurement can she expect once the water begins to boil?

At standard atmospheric pressure, water begins to boil at 100°C. Therefore, Carmen can expect the Celsius thermometer to read 100°C, which is choice B. The values 212 and 373 are associated with boiling water on other temperature scales, not Celsius.

AI-written and checked against the verified answer.