The correct answer is C) decrease agitation.
The rate of dissolution of a gas in a liquid is dependent on a number of factors including temperature, pressure, surface area, and agitation. When the agitation of the liquid is decreased, the rate of dissolution of the gas in the liquid also decreases. Agitation refers to the movement of the liquid and can be caused by stirring or shaking. When the liquid is agitated, it allows the gas molecules to come into contact with the liquid more frequently, which increases the rate of dissolution. Therefore, decreasing agitation will decrease the rate of dissolution of the gas in the liquid.
Increasing temperature, increasing surface area, and increasing pressure can all increase the rate of dissolution of a gas in a liquid. When the temperature is increased, the kinetic energy of the gas molecules increases, which allows them to move more freely and dissolve more quickly. Increasing surface area provides more contact between the gas and liquid, allowing for more rapid dissolution. Increasing pressure forces more gas molecules into the liquid, which increases the rate of dissolution.