Francis is learning about dissolving at school. she reads descriptions about the rate of dissolving from four of her friends. George: The rate of dissolving can be fast or slow. the only thing you can do to speed up the rate of dissolving is to make the temperature hotter.

Manuel: The rate of dissolving can change. The rate of dissolving gets faster when the particles are smaller the temperature is hotter or the mixture is stirred.

Kim: The rate of dissolving speeds up when the particles are larger and the temperature is hotter. Stirring the mixture also helps increase the rate of dissolving.

Chris: The rate of dissolving can speed up or slow down. Eating a mixture stirring a mixture or using smaller particles will slow down the rate of dissolving.

Which of her friends has the best description about the rate of dissolving?

A. George

B. Manuel

C. Kim

D. Chris