Explanation:

- Statement I: An increase in surface area enhances the rate of evaporation because there is more liquid surface exposed to air, allowing more molecules to escape.

- Statement II: A decrease in humidity increases evaporation as drier air allows more moisture to be absorbed from the liquid.

- Option 1: Both I and II - Correct as both factors contribute to higher evaporation rates.

- Option 2: Only II - Incorrect since Statement I is also valid.

- Option 3: Neither I nor II - Incorrect because both factors increase evaporation.

- Option 4: Only I - Incorrect because Statement II is also valid.

Correct Answer: Option 1 - Both I and II