A strong ruler who made sure to keep more power than his nobles is the kind of king was William the Conqueror. Hence, option C is correct.
Strong and determined, William the Conqueror made sure he retained more authority than his lords. William the bad man is another name for William the Conqueror.
Due to the style of life he had been subjected to since he was 8 years old, he was violent and greedy, but he was also a superb soldier and ruler with many ideas and was extremely organized. At a younger age, he was crowned as the first Norman King of England until his death.
Thus, option C is correct.
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