Explanation
Correct answer: B.
Choice B is the best answer. The sentence explains why nautical miles are used to measure distances in seafaring navigation, noting that they directly correlate to the coordinates on nautical charts that take into account Earth’s curvature, making them an efficient way to calculate distances at sea.
Why the other choices are wrong
Choice A
Choice A is incorrect. While the sentence describes what nautical miles are and their relationship to nautical charts, it doesn’t explain why nautical miles are used to measure distances in seafaring navigation.
Choice C
Choice C is incorrect. While the sentence indicates a reason why nautical miles are used, it misrepresents information from the notes: measuring distances with latitude and longitude does in fact account for Earth’s curvature.
Choice D
Choice D is incorrect. The sentence explains why nautical charts are more accurate than flat maps; it doesn’t explain why nautical miles specifically are used to measure distances in seafaring navigation.