What evidence most strongly suggests that an impact by an asteroid or meteorite may have caused the extinction of the dinosaurs?

• A. Fossils show that dinosaurs suffered from cold and starvation.
• B. There have been several near misses in recent years.
• C. The dinosaurs disappeared rather abruptly, virtually overnight.
• D. Most dinosaur fossils are fragmented, indicating that they were crushed by the asteroid.
• E. Sedimentary rocks at the Mesozoic-Cenozoic boundary contain a layer of iridium, a mineral uncommon on Earth.