Answer:
It is because of the USSR and them taking over lots of country's and for example the Vietnam war and the Korean war. In both wars the communist's parties were supplied by the USSR. Another thing is that both country's kept on feeling threatened by each other.
<span>A. Many people took out risky loans that could only be repaid if stock prices continued to rise. (apex)</span>
C. The earliest ancestors of humans lived in Africa.