According to the article on the cold war, what happened in 1917 that put a large strain on relations between the us and the soviet union?
a. the soviet union threatened the us with war.
b. the us threatened the soviet union with war.
c. the us and the soviet union entered world war i on opposite sides.
d. a communist dictatorship was established in russia after a revolution.

I am going to have to say D, A communist dictatorship was established in Russia after the Revolution, is the answer because the US was determined to spread democracy throughout the world and when Russia became communist that put a strain on relationships between the USA and Russia. The US in a round about way boycotted Communist countries.

Hopefully this helps.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

answer; i believe the answer is 80%, plz check first good luck;