In 911, charles the simple did something that would have a profound effect on french british history. what was it?

In 911, Charles the Simple did something that would have a profound effect on French British history. He allowed the Vikings to settle on the northwest coast of France in return for Rollo’s loyalty. It was a very bright decision because the northwest coast of France given to the Vikings was the most -attacked shoreline and by giving it to the Vikings supporter  help to the French people in dealing with attackers

The answer is option c.

B. total incorporation