GRE Reading Comprehension: Manhatton-GRE阅读Manhatton - 3496S4M64Y88WYYHA$

Which of the following best expresses the main idea of the passage? A. Edwin Hubble discovered Hubble's Law, a benchmark in modern physics. B. Hubble discovered that the universe is expanding, disproving the theory of the steady-state universe. C. Before 1929, most physicists supported one of two theories of the universe. D. All objects in space are receding from each other because of the expansion of the universe. E. Modern physics would not have progressed without Hubble's discovery of the expanding universe.