The main problems of evidence in dealing with early civilizations is that much of the potential evidence itself--such as tools, homes, etc--has vanished due to the fact that it was made of materials such as clay that could not withstand the test of time and weather.
A major impact of the Cuban Missile Crisis was that it brought the world dangerously close to nuclear war. This crisis showed that there was great potential for a nuclear armed conflict to potentially break out.
Answer:
C. California’s Central Valley
Explanation:
