Which of the following underlined parts is different in pronunciation?

A.breathe B.lead C.ahead D.heat

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閱讀短文，從所給的A、B、C三個選項中選出最佳選項。

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Scientists hope to create creative and emotional(有情感的) AI. The AI can possibly understand human feelings or create art. Many ways and tools have been tried to discover this wide and exciting field.

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