You are presented with the question "What decreases the amount of cars used to travel to a place?" and the following answer choices: 
- single-driver cars
 - motorcycles
 - Riding a bike
 - gas guzzlers
 - energy barrier
 - Temperature
 - vanpooling
 - adding heat

Now knowing that carpooling decreases the amount of cars used to travel to a place and carpools and vanpools can save time, choose the best answer.


 

       vanpooling  