Here's a problem to solve: A student is trying to dissolve 20 grams of sugar in a beaker containing 250 milliliters of water at room temperature. What can the student do to make the sugar dissolve faster in the water?

Among the 4 following options, which is the correct answer?

- A: decrease the temperature of the water
 
- B: use larger pieces of sugar
 
- C: stir rapidly
 
- D: use less water
 