Which of the following is false statement in respect of differences between machine and structure___________________?

A. Machines transmit mechanical work, whereas structures transmit forces
B. In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures
C. Machines modify movement and work, whereas structures modify forces
D. Efficiency of machines as well as structures is below 100%
E. Machines are run by electric motors, but structures are not