TOEFL Reading: ETS-TOEFL阅读机经 - 63XTDXQGC9O0M5VHL$

Which of the following is true of the concept of "continuous creation?" A. It suggests that hydrogen for new stars is created as galaxies move farther apart. B. It asserts that matter in the universe becomes denser as hydrogen is created. C. It explains why the galaxies are moving away from each other. D. It predicts a change in density of matter in the universe over time.