Final answer:
Water freezes at a temperature of 0°C on the Celsius scale, which is the correct answer to the question.
Step-by-step explanation:
Water is expected to freeze at a temperature of 0°C on the Celsius scale. This is a standard physical property of water, where the freezing point marks the transition from liquid water to solid ice. The other temperatures listed represent different states or scales: 100°C is the boiling point of water on the Celsius scale, 32°F is the freezing point on the Fahrenheit scale, and 212°F is the boiling point on the Fahrenheit scale.