31) According to the Dred Scott decision a) all slaves who spent time living in a free state were declared free

b) all persons born in the United States were citizens

c) Congress could legally prohibit slavery where ever it saw fit to do so

d) All of the Above

e) None of the Above​

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when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.

c. pro-democracy demonstrations.