The answer is would be C (Trade)
The Maya were native people of Mexico and Central America, while Aztec covered most of northern Mesoamerica between c.1345 and 1521 CE, whereas Inca flourished in ancient Peru between c.1400 and 1533 CE and extended across western South America.
Iran is in the west of China.
Increase in the monetary expansion, the formation of the new deal to make reforms for recovery, increase in trade and production.
<u>Explanation:</u>
The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States. The timing of the Great Depression varied across nations; in most countries, it started in 1929 and lasted until the late 1930s.
Certain policies and reforms were made to recover from the great depression. Some of the reforms and the policies were increase in monetary expansion which gave money in the hands of the people so that they could demand more leading to more production and employment opportunities. Trade was encouraged so that development could be increased.