16.     which extinction event is responsible for wiping out non-avian dinosaurs?  
            a.  the silurian extinction    b.  the permian extinction    c.  the devonian extinction    d.  the cretaceous-paleogene extinction 

The correct option is the D. The Cretaceous-Paleogene extinction

Explanation:

Although the events of this mass extinction are not completely clear, it has been determined that the non-avian dinosaurs did not have the ability to protect themselves from the stress that the earth was being subjected to at that time, ectothermic species like crocodiles, which had limited needs for food, found that as an advantage for survival.

the constitution of the united states gave congress the absolute authority over immigration laws

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