I think it was B because they detained them after the war because the Japanese got beat badly & they thought they would want revenge<span />
The Russian Civil War was a civil war fought from November 1917 until October 1922 between several groups in Russia. The main fighting was between the Red Army and the White Army. The Red Army was an army of communists. ... After this war, the communists established the Soviet Union in 1922.
Hope this helped!!!XD
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Answer:
B- opened borders to all foreigners that wished to visit China.