Alvarez and Others Proposed a Hypothesis That Dinosaur Extinction Occurred

Multiple Choice

Alvarez and others proposed a hypothesis that dinosaur extinction occurred because __.

A) they sickened and died because of a cross-species epidemic
B) the continents were flooded with seawater and they drowned
C) all their eggs were eaten by birds and mammals
D) the climate changed as the Ice Age began
E) one or more asteroids impacted Earth, resulting in environmental change