TOEFL Reading: ETS-TOEFL阅读机经 - 62RN3SF93C6H6KZ3L$

According to paragraph 2, what is true of both the evolutionary and steady-state theories? A. Both were based on the work of the same observer of the galaxies. B. Both were used to overturn the theories of the early twentieth century. C. Both took 30 years to become widely accepted by cosmologists. D. Both accommodate the fact that the galaxies are moving apart.