Most scientists agree that all of today's continents were part of a single continent known as Pangaea around 250 million years ago. The map below shows the theorized positions of some of these continents at that time. Which of the following would best provide evidence to support the theory that Pangaea existed in Earth's past? A. A scientist finds a Cynognathus fossil close to a Mesosaurus fossil in Africa. B. A scientist finds a large number of Mesosaurus fossils spread across South America. C. A scientist finds Lystrosaurus fossils in India, Africa, and Antarctica. D. A scientist finds a Glossopteris fossil in the ocean off the coast of India.