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.
In the late 1800s, American cities suffered from serious environmental pollution due to the smokestack emissions from hydroelectric power plants. The correct answer is D.
The goal of President Franklin Roosevelt's foreign policy focused on moving the United States from isolation to intervention. He started this movement cautiously by establishing diplomatic relations and opening trade markets with the Soviet Union and Latin American through the Good Neighbor Policy.
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That country would be India.
They used the technology in conquests to expand the empire.