One is the social reform movement.
Answer:
C.the southwestern part of Russia is very thinly populated
Jews were forced to move from their homes to basically what we would call slums, but they were called "ghettos", which is where we get the slang term.
The Parthian empire was a major Iranian political and cultural power in ancient Iran and Iraq. They were able to conquer civilizations like the Seleucid as they were able to seize Media and Mesopotamia from the Seleucid making them lose control of their eastern land and it was replaced by the Romans.