After the Civil War, contemporaries of Harriet Tubman's maintained that she has all of the qualities of a great leader：coolness in the face of danger, an excellent sense of strategy, and an ability to plan in minute detail.
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ATubman's maintained that she has
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BTubman's maintain that she had
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CTubman's have maintained that she had
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DTubman maintained that she had
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ETubman had maintained that she has
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正确答案: D