The answer here is that you should have put a question for me to answer.
Answer:
what language is this and what does it mean?
An unlimited government such as the human countries of North Korea, Cuba, Syria, Vietnam and China, is one where one person or a small group of people controls everything; it controls people's lives. The government's power has no limits.
I believe it is C. This is because in communism, citizen's power is limited rather than in socialism.
The correct answer is - trade.
The Sumerians engaged in trade with their move of exchanging their surplus food for materials like the copper that they needed to develop their weapons and thus their army forces. This was a very smart move from their side because they managed to use the resource they had in abundance but was scarce in the other surrounding areas so that they take what they need to become stronger and pretty much defend more efficiently from the same people they were engaging in trade with.