Concept:Distillation separates liquids by using their different boiling points.
Explanation:Alcohol and water do not separate by filtration because both are liquids.
Evaporation alone would remove both liquids and not separate them.
Condensation alone only changes gas back to liquid, so it cannot separate a mixture.
In distillation, the mixture is heated.
Alcohol has a lower boiling point than water, so it evaporates first.
This alcohol vapour is then cooled and collected as a pure liquid.
This process uses both evaporation and condensation together.
Therefore, the best method is distillation.
Answer:C. distillation.