The US and Soviet Union became rivals because of the differences in which how they were affected after war. They also had great political and economical differences that conflicted their alliation. Even their postwar goals were very different from each others.
It was the invention of the Printing Press that Johann Gutenberg introduced to Europe in the 1450s, which revolutionized the way in which books, and subsequently knowledge, were spread.
The correct answer is B.. the Macedonian king who took control of the Greek city-states and established an empire that stretched as far east as India.
He conquered what was at that time considered to be almost the entire world, hence the name "the Great". He successfully defeated Persia and died somehow when he was in India. The exact reason why he died young has never been found although there are speculations as to what happened.
