Answer:
Seventy-five years ago, on September 1, 1939, the world was shocked as Nazi troops invaded Poland. Tensions soared in Europe
Explanation:
I am not sure but I believe it was the African Americans.
Since the 1970s, the United States has struggled with two important environmental issues:
1. Oil and Fossil Fuels: After the oil crisis of 1973, the United States understood that it cannot solely rely on imported oil. Increased drilling in the US was required but this was also going to create problems for the environment.
Offshore drilling has been a major component of this concern and different administrations have been again or for increase drilling citing either environment or national security concerns.
2. Nuclear: The cold war saw the US and Russia on the brink of nuclear war. During the 70s, the general American public became increasingly aware of the dangerous of just not Nuclear Weapons but also peaceful nuclear power and waste problems.
Jim crow era or simply segregation .
A, C and D, These reasons caused mayhem when countries got their independence
