D. All of these choices are correct.
A is correct because Nixon tried to pull American troops from Vietnam though it took him awhile. B is correct because containment was one of the main factors of the Truman Doctrine. C is correct because Eisenhower was president during WWII when the country focused on military and economic strength.
Answer:
Total Impact of Imposed and Announced Tariffs
If all tariffs announced thus far were fully imposed by the United States and foreign jurisdictions, U.S. GDP would fall by 0.51 percent ($127.21 billion) in the long run. Wages would fall by 0.35 percent and employment would fall by 394,300.
The climate cooled and many tropical areas experienced freezing temperatures for the first rainfall gradually diminished and areas that were once grassy and forested became deserted volcanic activity turned much of the area into lava fields where few life-forms could survive rainfall gradually increased and desert areas eventually became rain forests
Industrialization would later influence imperialism and encourage free trade.
