I believe your answer would be C! Hope this helps =]
The answer would be B-the real reason reason Rome fell
They have a command economy because the government regulates each aspect of the economy.
The correct term is voter turnout.
Voter turnout represents a percentage of how many eligible voters came out and participated in a recent election. Demographics refers to breaking down individuals who voted in elections based on different factors like race. The other two terms are somewhat unrelated to voting.