Which of the following can be inferred from the passage about the "geologists"? A. They underestimate the frequency with which extraterrestrial impactors strike Earth. B. They regard energy from extraterrestrial sources as irrelevant to terrestrial dynamics. C. Their views about terrestrial dynamics challenge one of Newton's fundamental principles. D. Their views about terrestrial dynamics formed the basis for Shaw's "open-system" view. E. Their views about extraterrestrial dynamics pose a challenge to current geophysical theory.