Please choose the correct answer to the question: A teacher puts a cup of coffee into the cup holder of a car. When the car stops suddenly some of the coffee spills out of the cup. Which statement best explains why the coffee spills?

Answer1: The coffee stays in motion because the stopping force acts only on the car. Answer2: The coffee stays in motion because a force from the cup holder pulls on the coffee. Answer3: The stopping force on the car causes an equal and opposite reaction from the coffee. Answer4: The stopping force causes the motion of the car to slow down and the motion of the coffee to speed up.

Answer format: answer1/answer2/answer3/answer4