Which of the following statements is a fact and not an opinion? Select one: a. The Azteas and the Incas developed in vastly different geographic locations O b. Incan and Aztec political systems were ingenious and ensured justice for the people c. The Incas ruled their empire more successfully than the Aztecs. Od. The staple crop of the Aztecs was corn, while the staple crop of the Incas was the potato​