13. the mass extinction of the dinosaurs, approximately 66 million years ago, is inferred by most scientists…

13. the mass extinction of the dinosaurs, approximately 66 million years ago, is inferred by most scientists to have been caused by\na a large energy surge from the surface of the sun\nthe occurrence of a major ice age\nan impact event occurring on earth’s surface\nd earthquakes occurring along crustal plate boundaries

13. the mass extinction of the dinosaurs, approximately 66 million years ago, is inferred by most scientists to have been caused by\na a large energy surge from the surface of the sun\nthe occurrence of a major ice age\nan impact event occurring on earth’s surface\nd earthquakes occurring along crustal plate boundaries

Answer

Brief Explanations:

Most scientists believe the mass - extinction of dinosaurs about 66 million years ago was caused by a large asteroid or comet impact event on Earth's surface. This impact led to massive environmental changes such as dust clouds blocking sunlight, causing climate cooling and disrupting the food chain.

Answer:

C. an impact event occurring on Earth’s surface