Prior to the start of the Hundred Years' War, who gained control of the channel of water between England and France and the North Sea?

England

Explanation:

Prior to the Hundred Years War (1337 - 1453) over the ruler-ship of France which ended in victory for the French, England was in control of the channel of water between England and France and the North Sea> France gained control of it at the end of the war.

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