I would go with C but that's just my personal opinion, I chose C because she only did it to group A
Answer:
A. independent variable.
Explanation:
In this experiment, the types of box materials are a(n) independent variable, which is when you purposely change things or control them, hoping for a specific outcome.
The choices you've posted don't include any graph that shows it.
The resultant force is 5N.So the box moves to right with constant acceleration.
