[单选题]
Can work be done on a sy.)trk:j/2usyxzm hr7 3.xcscut yzk .12 dew.stem 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.
