The quote that best summarizes scientists' knowledge about dark matter is B: "In many ways, scientists know more about what dark matter is not, though they do have a few ideas about what it could be." This statement encapsulates the current understanding that while much is still unclear about dark matter, there are certain things that have been ruled out, and some speculative ideas about its nature.
Question 32 Which quote from the text best summarizes scientists' knowledge about dark matter? A. "Vera Rubin and her colleagues confirmed this result by studying galaxy rotation." (Paragraph 5) B. "In many ways, scientists know more about what dark matter is not, though they do have a few ideas about what it could be." (Paragraph 6) C. "Because scientists can't see dark matter directly, they have found other ways to investigate it." (Paragraph 10) D. "When two dark matter particles crash into each other, they might release a gamma ray." (Paragraph 12)
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