Which method would increase the solubility of a gas

Increasing the partial pressure of the gas over the liquid or lowering the temperature of the liquid can increase the solubility of a gas in a liquid. I hope this. Let me know if anything is unclear or if you want any further explanation.

Increasing the partial pressure of the gas over the liquid or lowering the temperature of the liquid can increase the solubility of a gas in a liquid

Explanation:

Liquids and solids exhibit much no modification of solubility with changes in pressure. Gases as may well be expected, increase in solubility with a rise in pressure. law states that: The solubility of a gas during a liquid is directly proportional to the pressure of that gas on top of the surface of the solution.