Eastern Europe wanted to be independent from the Soviet Union, but did not feel strong to oppose Soviet Union: only upon its collapse could they really become independent.
And Soviet Union did not support religion: so religious groups could function more in the open after the collapse of the Soviet Union.
I really wish you provided the research study. I would be happy to answer. It should be attached to wherever you found this question. Hope this helps :)
B ) a decrease in the supply of consumer goods
http://www.beaconlearningcenter.com/documents/5215_4498.pdf
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The reservation system gave indigenous people freedom and allowed them to keep some of their cultural and social traditions.
(I hope this helps)