Alvarez and Others Proposed a Hypothesis That Dinosaur Extinction Occurred

question 40

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

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