Which of the following statements on the innovations created by ancient cultures is true? A. The Incas focused on innovations in transportation, while the Aztecs focused on agriculture. B.The Incas focused on innovations in agriculture, while the Aztecs focused on transportation. C. The Aztecs focused on innovations in public record-keeping, while the Mayas focused on agriculture. D.The Aztecs focused on innovations in agriculture, while the Mayas focused on transportation.