Select all the correct answers. Illustration of Fossil sample 1 (left) and Fossil sample 2 (right) with three layers A, B, C top to bottom. Sample 1 layers are cave bear, igneous rock, Plateosaurus. Sample 2 layers are Plateosaurus, sedimentary rock, ostracoderm. Which statements about the two fossil images are correct? Cave bears are ancestors of Plateosaurus. Plateosaurus were present on Earth before ostracoderms. Ostracoderms were the first to die. Plateosaurus died after the ostracoderms. Cave bears are the oldest fossils.