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.