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King Louis XIV became king at the age of four years old. This young age is quite remarkable for ascending to the throne. His reign began in 1643 when his father, King Louis XIII, passed away, making Louis XIV the new king of France.
At the time of his coronation, being only four years old, Louis XIV was too young to rule independently. Therefore, during the early years of his reign, a regency was established to govern on his behalf until he reached an age where he could rule on his own.
So, the correct answer to your question is b. Four years old. This significant event marked the beginning of Louis XIV's long and influential reign as the King of France.
