Read the claim for an argumentative paragraph that discusses why the chronometer was the most historically significant object in MacGregor’s text.The chronometer was the most historically important artifact because it changed the face of international trade.

The claim says the chronometer was historically important because it changed international trade. Choice D best supports that idea: accurate timekeeping helped explorers determine locations and make accurate maps, which enabled safer, faster shipping routes. Choice A gives background about the effort to create a reliable clock, while C describes one chronometer; neither explains the effect on trade as directly.

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