OG1 阅读 Q51

Choice D is the best answer. In lines 85-87("exploitation... seek"), the author of Passage 2 states that the future of space mining will prove difficult without regulations because "claims will be disputed, investments risky, and the gains made insecure."
Choices A, B, and C are incorrect because they do not provide the best evidence for the answer to the previous question. Choice A is incorrect because lines 60-63("Part... suggest that") present some environmental concerns toward space mining. Choice B is incorrect because lines 74-76("The resources... barely") focus on how space mining may discover valuable resources that are different from the ones found on Earth. Choice C is incorrect because lines 81-83 simply describe one person's objections to the regulation of the space mining industry.