which statement best describes germanys submarine campaign during world war i?\ngermany made no use of…

which statement best describes germanys submarine campaign during world war i?\ngermany made no use of submarines.\ngermany used submarines in land and sea attacks.\ngerman submarines made unrestricted attacks on ships.\ngerman submarines prevented all transatlantic shipping.
Answer
Brief Explanations:
During World War I, Germany's unrestricted - submarine warfare involved attacking ships without warning. Germany did use submarines, not on land, and did not prevent all trans - atlantic shipping.
Answer:
German submarines made unrestricted attacks on ships.