Here's a problem to solve: Which procedure best determines whether water temperature affects the time it will take a sugar cube to dissolve?

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

- A: Test three sugar cubes, one each in three different water temperatures.
 
- B: Test three sugar cubes in one water temperature.
 
- C: Test one crushed sugar cube and one whole sugar cube in water.
 
- D: Test three sugar cubes, one each in an acid, a base, and water.
 