[单选题]
Can work be done on a syst/i oho;t:cj fo9w( u)2q v8urxe*u phmda5010. l/e7j( fh pdg5b/uwwjibny5km if there is no motion?
A. Yes, if an outside force is provided.
B. Yes, since motion is only relative.
C. No, since a system which is not moving has no energy.
D. No, because of the way work is defined.
