Lady Macbeth's plan is that she and Macbeth will kill King Duncan and his men as they sleep (option C).
At the end of Act I of "The Tragedy of Macbeth," Lady Macbeth plans to commit murder with her husband. They are both ambitious people who have decided to take the crown from King Duncan.
Her plan is to give Duncan's men wine to make them intoxicated. Once everyone is asleep, including Duncan himself, she and Macbeth will kill them.
With the information above in mind, we can select option C as the correct answer.
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