TOEFL Reading: ETS-TOEFL阅读机经 - 59HG319CKIJ8DFE3L$

According to paragraph 2, which of the following factors probably contributed to the extinction of the dinosaurs A. The length of time it took dinosaurs to reproduce B. Large quantities of dead material disturbing their habitats C. Increased competition for food from scavengers D. An increase in carnivore populations