PT 15 S1 Q1

Until the 1980s, most scientists believed that non-catastrophic geological ... ...

The passage suggests that during the 1980s researchers found meteorite impact a convincing explanation for the extinction of dinosaurs, in part because
(A) earlier theories had failed to account for the gradual extinction of many ocean species at the end of the Cretaceous period
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Science & Technology Mix 2