Please choose the correct answer to the question: A shallow container of salt water is placed in sunlight for a day. Which is the most likely result?

Answer1: All of the mixture will evaporate. Answer2: The salt will keep the water from evaporating. Answer3: The salt will separate from the water and float at the top of the container. Answer4: Only the water will evaporate and the salt will remain in the container.

Answer format: answer1/answer2/answer3/answer4
Answer: answer4