Who was charlemagne? a. pope of the holy roman empire b. wife of the last roman emperor c. king of the franks d. prime minister of the carolingian dynasty

Charlemagne also known as Karl and Charles the Great, was a medieval emperor who ruled much of Western Europe from 768 to 814. In 771, Charlemagne became king of the Franks, a Germanic tribe in-present day, Belgium, France, Luxembourg, the Netherlands and western Germany.

So, the right answer goes to C) King of the Franks