Higher pressures increase the solubility of gases. You are probably familiar with this concept as it relates to carbonated beverages. Before opening the container, the inside is pressurized, so a large amount of CO 2 is dissolved in the liquid. After opening, the pressure decreases (to the ambient pressure), so the solubility of CO 2 drops, causing it to bubble out of solution. Because they are not compressible like gases, solid and liquid solutes do not have noticeable changes in solubility at different external pressures.
Dan and Sam were enjoying a beverage on a hot day. Dan was drinking a soda while Sam was drinking lemonade. They both left their drinks open while they went for a quick swim then returned to finish them.
Who's drink did not responded to a change in pressure Sam's or Dan's?