Answer:
the Big brother policy was an extension of the Monroe doctrine formulated by James g Blaine in the 1880s that aimed to Rally Latin American Nations behind us leadership and open their market to us traders Blaine served as secretary of State in 1881 under President James a Garfield.
Answer:
D. OPEC actions
Explanation:
The downfall of the US oil industry in the 1980s was caused by a reduced demand for oil caused by the energy crises of the 70s and with this reduced demand, there became an oil glut, because the production was also increased.
Therefore, this downfall of the oil industry in America in the 1980s was caused by increase in oil prices by OPEC (Organisation of Petroleum Exporting Countries).