"Warships traveled with merchant ships for protection" convoys use to help the Allies combat German submarine warfare.
Answer: Option C
Explanation:
By using their own submarines, Germany fought back to attack neutral ships supporting the Allies. Equipped with torpedoes, the fearsome U-boats patrolled the Pacific. They were the only tool of gain for Germany because Britain successfully blocked imports to German coasts.
The very first move in being capable of defending against it and defeat the submarines was to find them. All through the war, Allied radar technology has been much stronger than its German counterparts. Aircraft fitted with radar would account for the majority of Allied kills against U-Boats from 1943–1945.