Answer
No idea
Explanation
They controlled people through fear of their gods of their religion. Also they had access to plenty of gold which was valuable at the time.
The answer is: C
This is because the graph indicates the sharp decline of the rural population, due to in large part to the increase in urbanization and the ever-growing industrialization of the United States throughout the decades.
As such we can analyze that, as the years go by the population trends to move to urban areas in place of rural ones.
It would be the Arabian penisula