TOEFL Reading: ETS-TOEFL阅读机经 - 3JQ7K3OE5AX52T6CL$

Which of the following best describes the relationship between paragraphs 6 and 7? A. Paragraph 6 makes a claim about support for the Big Bang cosmology and paragraph 7 describes how the distribution of quasars provides that support. B. Paragraph 6 describes the similarities between the steady-state and Big Bang theories, while paragraph 7 explains the differences between them. C. Paragraph 6 presents a question about quasars while paragraph 7 provides several possible answers to that question. D. Paragraph 6 describes the chemical composition of quasars while paragraph 7 describes the locations of quasars.