A. Charlemagne.
Step-by-step explanation:
Absolute monarchy is where one ruler has all of the power over the people and the land. This was very popular during medieval Europe and many rulers wanted to obtain absolute monarchy. Although this may seem terrible, some people thought it would end civil wars, as the whole land would have to obey to one ruler. Charlemagne was the one who launched the Age of Absolutism, where monarchs had all of the control. After the French Revolution and the American Revolution, absolute monarchy pretty much died off, as people now wanted equality and not to be controlled.