What made Germany invasions of Europe difficult to stop during workout war 2

Which statement about submarine use in world war i is true? the allies never found a way to counter german submarine warfare. germany’s use of submarines affected the united states’ decision to enter the war. only the germans used submarines in world war i.

Which best describes the effect of europe on aboriginal peoples?

Which consumer uses the most water in the united states each year? a. livestock b. power generation c. industry and mining d. public water consumption