C is true, and just one of those has as much mass as about 1,840 electrons.
It's number three on your worksheet. ;)
A. when it reaches the top of its flight
potential energy increases as the height of the object does, and the highest point of a ball's flight is when it reaches the top.
A transverse wave. A wave is a disturbance that transmits energy from one place to another by the particles of the medium.
