Which one of the following is not a factor that affects Evaporation?

Factors that affect the process of Evaporation are Humidity, Surface Area, and Temperature. Air pressure doesn't affect the process of Evaporation. An increase in the surface area, decrease in surface area, and increase in the temperature, increases the rate of evaporation.

The higher the temperature of a substance or liquid, the greater is the kinetic energy of the molecules at its surface, and therefore the faster the rate of evaporation. 

Hence option A is correct