It's most likely that the Mayans abandoned their cities but no one knows why
Explanation:
The European Slave Traders told the tribes they’d give them resources if they helped them capture African natives to be sold as slaves. Tribes in Africa started to attack the members of other tribes, capture them and take them to the European slave traders to be sold as slaves.
C people needed a place to sell and buy goods
I just took that test too so the answer is B
1.) Emperor Constantine saw the Church as a potential unifying force in the Empire, but knew that the Church could not unify the Empire unless it was, itself, united. He set out to impose order and create a stable hierarchy under his leadership. The most important event of this period for Christianity was the Council of Nicaea, which he chaired in 325 to obtain consensus on important issues facing the Church. Constantine gave the Church control of the distribution of food <span>to the poor. Although the food continued to be supplied and paid for by the state, the Church was able to claim the credit and to proselytise among its new clients.
2.) </span><span> In the Third Century, due to invasions and other political issues, the Roman Empire lost their Philosophical and </span>Religious<span> beliefs. Due to confusion, people began to lean toward newer </span>religions<span>, like, Muslimism and Christianity.</span>