TOEFL Reading: ETS-TOEFL阅读机经 - 304ROQ450R3RLA9KL$

According to paragraph 3, the shower of debris created by the impact suggests that the impactor A. was 200 kilometers across B. landed about 1,000 kilometers inland C. had a molten core that solidified immediately as the impactor hit Earth D. was probably responsible for the immediate extinction of many North American species