In this section, you will hear one passage. At the end of the passage, you will hear four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).A、By studying the bones of dinosaurs.
B、By studying the remains of dinosaurs.
C、By studying the fossils of dinosaurs.
D、By studying the food of dinosaurs.