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单选题
You need to write a multicast delegate that accepts a DateTime argument.Which code segment should you use？（）
A
public delegate int PowerDeviceOn（bool result，DateTime autoPowerOff）；
B
public delegate bool PowerDeviceOn（object sender，EventArgs autoPowerOff）；
C
public delegate void PowerDeviceOn（DateTime autoPowerOff）；
D
public delegate bool PowerDeviceOn（DateTime autoPowerOff）；
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