In the asteroid impact theory of the extinction of the dinosaurs some 65 million years ago,the dinosaurs (and over half of all the other species on Earth at that time)died off largely because
A)of injuries suffered from direct hits of pieces of the asteroid or comet.
B)dust injected into the stratosphere from the impact absorbed visible light from the Sun,causing global temperatures to plummet.
C)radiation from iridium in the asteroid caused the dinosaurs to die of cancer.
D)the impact caused massive earthquakes and volcanic activity worldwide.
E)dust settled on the leaves of plants,making them inedible,so the animals died of starvation.

Question

Quizplus · Accepted Answer

The dust injected into the stratosphere from the impact absorbed visible light from the Sun, causing global temperatures to plummet. This led to a dramatic cooling of the planet and disrupted the food chain, ultimately leading to the extinction of the dinosaurs and many other species.

In the Asteroid Impact Theory of the Extinction of the Dinosaurs