This is true!
The method was to write the question that people wanted answered, for example about the future weather or success or failure in a war, on a bone and then throw this bone into a fire.
The answer would be interpreted from the cracks on the bone.
1. The rulers who came to power after Charlemagne failed to defend the empire.
2. Europe was threatened by Muslims, Magyars, and Vikings in the 9th and 10th centuries.
<h2><u>Answer:</u></h2><h2><u>Historians have identified several causes that led to the outbreak of the Cold War, including: tensions between the two nations at the end of World War II, the ideological conflict between both the United States and the Soviet Union, the emergence of nuclear weapons, and the fear of communism in the United States.</u></h2><h2><u>Explanation:</u></h2><h2><u>I hope i helped =)</u></h2>