C. Mongols I believe that it happened in 1223
Explanation:
The Romans actually used urine to brush their teeth. They did this because of the presence of ammonia in it.
<span>The bitterness left behind in parts of Europe by the Treaty of Versailles contributed to the rise of D. totalitarianism.
Totalitarianism has to do with a form of dictatorial rule, seen in the rule of Hitler and Mussolini. They exploited this emotion of bitterness and eventually led to the World War II, where their rule was authoritarian. </span><span>
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