10. The best title of the text is.... A. The enemies of dinosaurs B. The fossils and enemies of dinosaurs C. The mysterious existence of dinosaurs D. The disappearance of dinosaurs E. The scientists' researches

<p>The best title for the text is:</p><p><strong>D. The disappearance of dinosaurs</strong></p><p>This title best captures the main focus of the text, which discusses the extinction of dinosaurs and the theories surrounding their disappearance. The text also briefly mentions the fossil record, but the primary emphasis is on the extinction event itself.</p>