I want to say government or farming. Farming because it started a sort of trade and barter system, but government because it created regulations for a village lifestyle? I think it depends on what time period you're studying.
Answer:
C. China became a global powerhouse
Explanation:
Deng Xiaoping took over after Mao passed away and since then China has come to be known as one of the largest economies of the world with tremendous global political power and a rapidly improving military.