Which is the best claim for an argumentative paragraph that discusses why the marine chronometer is the most historically important object?

A strong argumentative claim gives a clear reason that supports the object’s historical importance. The marine chronometer made it possible to measure time accurately at sea and determine longitude, improving navigation and helping ships establish their positions. Choice D, “it established a standard measure of time and position,” gives a broad reason for its importance; the other choices focus on its use by particular explorers or assert a comparison without explaining it.

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