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What happened to Russian society after Nicholas I came to power following the death of Alexander I in 1825?
 
  a. It became the most liberal of the European powers.
  b. It rapidly industrialized.
  c. It became an industrial power after the abolition of serfdom.
  d. It was increasingly influenced by ultra-conservative societies, such as the Northern Union.
  e. It became a police state, as the czar feared both internal and external revolutionary upheavals.

e