A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following would correctly represent the result?
A) A graph with a constant temperature of 0°C until all the ice melts, then a gradual rise in temperature.
B) A graph with a constant temperature of 0°C until all the ice melts, then a sudden increase in temperature.
C) A graph with a gradual increase in temperature throughout the heating process.
D) A graph with a sudden increase in temperature throughout the heating process.