Julie takes a cold glass of clear, colorless liquid out of the refrigerator and puts it on the table. as the liquid warms up to room temperature, julie sees bubbles of gas form in the liquid and rise to the surface.

which conclusion is best supported by julie’s observations?

As the liguid warms up, the dissolved gas increases its motion thereby breaking its molecular bonds with the liquid and thus releasing the gas. When the liquid was cold the gas had less motion so did not bubble or fizz. Heat definitely affects the molecular bonds between the gas and its liquid allows the gas to escape. 

Solubility would be your answer.