Which of the following was the most direct effect of the Black Death on Medieval Europe Group of answer choices

A. the Renaissance

B. the end of serfdom

C. advances in medical science

D. the loss 60% of the population of Europe

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.