If the Hypothesis Tracing the Extinction of the Dinosaurs to an Impact

Multiple Choice

If the hypothesis tracing the extinction of the dinosaurs to an impact is correct, the dinosaurs died off largely because ________.

A) of global climate effects initiated by dust and smoke that entered the atmosphere after the impact
B) of injuries suffered from direct hits of pieces of the asteroid or comet
C) radiation from iridium in the asteroid caused the dinosaurs to die of cancer
D) the impact caused massive earthquakes worldwide