In which of the following is work being done?


A.

A traveler lifts a suitcase from the floor up to the baggage cart.


B.

An elevator carries people from the ground floor to the fifth floor.


C.

A woman tries hard to lift a barbell, but the barbell doesn’t move.


D.

A child drags her large teddy bear across the floor.


E.

A rocket ship rests on the moon.