Paragraph 1 supports which of the following statements about the revealing of early Mesoamerican civilization? A. The Maya and Olmec civilizations were discovered by explorers at approximately the same time. B. Most of our understanding of Mesoamerican civilization comes from discoveries made in the twentieth century. C. The discoveries made at Oaxaca in southern Mexico show that the Olmec civilization had its origins there. D. Evidence still to be found in Oaxaca, Mexico, is likely to provide additional information about the high civilization of early Mesoamerica.