Which of the following can be inferred from paragraphs 2 and 3 about the Volcanic eruptions of the late first millennium B.C.? A. They were more frequent than historians once thought. B. They may have done more damage to Teotihuacán than to neighboring centers. C. They may have played a major role in the rise of Teotihuacán. D. They increased the need for extensive irrigation in the Teotihuacán Valley.