What was Germany's main justification for unrestricted submarine warfare in World War I? Choose 1 answer: Choose 1 answer: (Choice A) A It wanted to goad the United States into entering the war (Choice B) B It wanted to kill as many civilians as possible (Choice C) C Britain's blockade of Germany was crippling and this was the only way to attempt to blockade Britain (Choice D) D Submarines were safer than ships (Choice E) E It was the only way to defeat the Russians