4. Two students are doing an experiment to find out the way the temperature of water affects the speed at which powdered drink mix dissolves. They use one pitcher of ice water and one pitcher of
water at room temperature. They conclude the drink mix dissolves faster in warmer water. Which of
these observations provides evidence to support their conclusion?
A. At the end of the experiment, the ice cubes all melted.
B. At the end of the experiment, the mix dissolves in both pitchers.
C. Stirring the water made the mix dissolve faster in both pitchers.
D. After two minutes, the ice water had some mix that did not dissolve.