The correct answer to this open question is the following.
The benefits of USA in the experience of having minerals:
-Minerals allow for the economic exploitation of raw materials.
-It is a good source of income for this industry.
-Minerals can be exported and are highly demanded by other nations.
-The exploitation of minerals has created thousands of jobs in the country.
The disadvantages of having minerals:
-Mining damages the land. Dynamite explosions are needed to dig in the dirt.
-This industry damages the ecology of the place. It is not good for the environment and the wildlife.
-Mining towns that once were very productive end up being ghost towns.
Answer:
The phrase means that European powers should leave the continent, allow Africans to become independent nations and refrain from interfering in their economy. It was a claim similar to the Monroe Doctrine: Africans don't interfere in Europe, Europeans shouldn't interfere with Africa.
Neither, in all honesty the amount of nuclear explosives both countries have they would completely destroy each other. There would be no winner
During WWll, with white men fighting overseas, African Americans were able to get better job opportunities, and a new law passed saying that blacks and whites had to be in integrated units in the army. But, when the war ended and black soldiers returned to America they weren't greeted with a hero's welcome and instead were treated like all other blacks- they were forced to be segregated. This change from almost equality to none at all really fired up the Civil Rights Movement in the 1950's and 1960's.
I believe it was the "Europe First" strategy. Hope this helped!