In which situation is work being done? (Check all that apply.) Your

A. A boy coasting down the sidewalk on a skateboard.

B. Lifting your binder out of your backpack into your top row locker.

C. Pushing a shopping cart down the aisle at Publix.
D. Pushing on a broken down car but it doesn’t move.
E. The legs on your science table are holding up the table top.
F. Using paddles to push back on the water to propel your canoe forward.