If the system state is Shutdown then it can respond to which of the following message?

If the system state is Shutdown then it can respond to which of the following message?

A. restart()
B. reconfigure()
C. powerSave()
D. all of the mentioned

Explanation: A restart() message causes a transition to normal operation. Both the powerSave() and reconfigure() messages cause a transition to a state in which the system reconfigures itself.