Which of these was a factor in the united states entrance in world war i?
a) the invasion of poland
b) japan's invasion of china
c) the axis threat to the panama canal
d) german unrestricted submarine warfare

Which statement best describes the underground railroad? a.) it is a train that took slaves from the south to the north. b.) it is a business that harriet tubman founded to slaves become free. c.) it is a secret route that slaves took to escape from southern slave states to the north. d.) it is a road that slave owners disliked using for travel.

Which british law required americans to house and feed british troops? sugar and molasses actstamp actnavigation actsquartering act

What was the main cause of the russian revolution? a. the protests against the war with poland b. the tremendous war losses of world war 1 c. the protests against the treaty of brest- litovsk d. the losses dictated by the treaty of versailles