笔记本电源计划

You need to configure the power settings of your portable computer so that the display turns off when it is inactive and running on battery power. You also need to ensure that the power
settings of the hard disk remain unaffecteD.
What should you do?
A.Change the advanced power settings of the Balanced power plan.
B.Configure the portable computer to use the Power saver power plan.
C.Configure the portable computer to use the High performance power plan.
D.Restore the Power Saver power plan to the default settings.

如上题，均衡电源计划是怎么回事？对应XP的什么电源计划，均衡电源计划在多久之后关闭硬盘 还是一直都不关闭电源呢？the display turns off是什么意思？关闭监视器还是进入屏保什么的？
谢谢了，回答的好的我再加分！

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