Question: To evaporate seawater to make it drinkable.

  Options: 
 A. Take a black bucket and put a cup inside in the center. Pour the sea water around the cup. Cover with plastic and seal it using rubber band. Place in sunny spot. Wait until seawater evaporates and condenses down the sides.
 B. Take a black bucket and put a cup inside in the center. Pour the sea water around the cup. Cover with plastic and seal it using rubber band. Place in sunny spot. Wait until seawater evaporates and condenses into the cup.
Answer: B