When You Push a Child in a Swing,you Most Likely

Multiple Choice

When you push a child in a swing,you most likely

A) push with as large a force as possible.
B) push with a periodic force as often as possible.
C) push with a periodic force,with a period that depends on the weight of the child.
D) push with a periodic force,with a period that depends on the length of the ropes on the swing.
E) push with a force equal to the weight of the child.