It was the internal reforms of Mikhail Gorbachev, the last Soviet leader that led to the end of the Cold War
The correct answer is "Charlemagne crowned Holy Roman emperor, 800 CE."
The event that belongs in place C on the timeline is "Charlemagne crowned Holy Roman emperor, 800 CE."
In one of the most important events of that time, the pope Leo III crowned Charlemagne as the New Emperor of the Roman Empire. The exact date, December 25, 800 CE. Charlemagne was the King of the Frankish and was the one who could exert the leadership and influence to calm down the situation in Rome. One of the first things Charlemagne did was to improve the education conditions in the Empire.
It would strain the relationship
Do you mind telling me what the two areas are?
"<span>Membership in the League could draw the United States into future wars" would be the best option from the list, since the United States was heavily isolationist at this point, especially after fighting in World War I. </span>