In the Early Sixteenth Century, Which of the Following Contributed

In the early sixteenth century, which of the following contributed to the Aztecs' constant warfare?

A) The Aztecs' neighbors were unwilling to trade with them, requiring warfare to secure highly desired luxury items such as rare quetzal feathers.
B) The Aztecs believed that the gods required human hearts and blood, leading to the sacrifice of thousands of war captives.
C) The Aztecs and their neighbors were engaged in a bitter struggle to obtain control of the Yucatan Peninsula.
D) The Aztecs' neighbors attempted to choke off their access to the sea, denying the Aztecs sources of fish protein and coastal trade.