Rolf is comparing four solutions. solution a was placed in the fridge, which is at 4°c. solution b was placed at room temperature, which is 20°c. solution c was placed in an incubator at 37°c, and solution d was boiled at 100°c. rolf then added the same amount of solute into each solution and agitated it at the same speed. the chart indicates his results for the amount of solute dissolved. which temperature allowed for an unsaturated solution?

Rolf is comparing four solutions. Solution A was placed in the fridge, which is at 4°C. Solution B was placed at room temperature, which is 20°C. Solution C was placed in an incubator at 37°C, and solution D was boiled at 100°C. Rolf then added the same amount of solute into each solution and agitated it at the same speed. The chart indicates his results for the amount of solute dissolved. The solution which unsaturated is the one that is boiled at 100°C. The more the temperature is, more it has saturation limit. More solute can be dissolve in a high temperature.

i believe the answer is a