Final answer:
Charles V, a powerful emperor and the king of Spain, gave up his power and went to live in a monastery.
Step-by-step explanation:
The correct answer is Charles V (option A)
Charles V was a powerful emperor and the king of Spain. He inherited the throne in 1516 after the death of his grandfather, Ferdinand II, and ruled over a vast empire that included Spain, the Spanish colonies in the Americas, the Netherlands, Austria, and parts of Germany.
However, in 1556, Charles V decided to give up his power and abdicated the throne. He retired to a monastery and left the throne to his son, Philip II.