Answer:
Your answer would be D) When you push on an object, it pushes back just as strongly on you.
Step-by-step explanation:
This was the only question I had gotten wrong on my test. I thought B would be it, but I can see where the mistake was. According to Britannica.com "The third law is also known as the law of action and reaction". which would fit with D if you think about out.
Hope this helps and Good luck!