Question: Many people get fresh water from wells that reach water stored underground. When there is little rain, the water can begin to run out. Which step is best to make the water last longer?

  Options: 
 A. using sprinklers for fewer hours each week
 B. washing vehicles in the middle of the day
 C. spraying water to clean oil from parking lots
 D. letting faucets run while brushing teeth 
Answer: A