Answer:
Neither the boy is right. The car will move in the opposite direction, to the left.
Step-by-step explanation:
If a body moves through a fluid (a gas, a liquid or a vapor, and even air), a force arises that opposes this movement, causing the body to assume a opposite movement. When it comes to air, this force is called the air resistance force.
In the case of the above question, Sandy put a straw to direct the air to the right, because of the resistance force, the car will go the opposite way causing the car to move to the left.