The early ages because in the early ages it was hard for their family to have food so they save some for the winter
Immediate conflicts:
... The USA had atomic weapons and the USSR did not. (The US would not share that technology with the Soviets.)
... The USSR did not assure that free and fair elections took place in Eastern Europe -- it saw to it that Soviet-aligned governments were installed there.
... Tensions over the East Germany / West Germany and East Berlin / West Berlin division of territory.
Deeper causes:
The USA was committed to capitalism and democratic institutions of government.
The USSR was committed to communism and imposed authoritarian government.
The Cold War was mostly a tension between these worldviews.
The correct answer to this open question is the following.
The United Farm Workers' grape boycott that began in 1966 affected the country in that it was carried out nationwide. American people supported the workers and stopped consuming grapes in the United States. The also called Delano Grape Strike that started in September 1965 was organized by Mexican-American workers and Philipino-American workers. They demanded better working conditions and fair wages. In the end, workers received some benefits such as better salaries and health-care benefits.
Answer:
The answer is D., European Union.