Answer:
B. The Internet might provide a forum through which people could unite and rebel.
Explanation:
B is the only answer that can give harm to specifically a ruler and not the public like A and C talk about.
The measure that citizens can use to vote down the state government's legislation is called a "referendum". If instead it is a politician that the people want to remove then it's called a "recall".
The Soviet Union - they were the cause and driving force behind Communism in Eastern Europe from the 1920/30s into the 80s. Without their military power and influence, communism in Eastern Europe fell away.