What do the arrows in this photograph represent?
A. Gravity and air resistance
B. An action-reaction force pair
C. A pair of unbalanced forces at work
D. Friction and air resistance
![What do the arrows in this photograph represent A Gravity and air resistance B An actionreaction force pair C A pair of unbalanced forces at work D Friction and class=](https://us-static.z-dn.net/files/d90/1e29e4bf8a56a06bc276ebd682511d6e.png)