Qin Shi Huang, The First Emperor, standardized China's currency, writing, and measurements which helped in the creation of a_.

centralized state

Explanation:

Also known as the 'First Emperor of Qin', Qin Shihuang who ruled between 221 to 206 BC engaged in the military conquests of many surrounding states. He finished the Great Wall of China and constructed the terracotta army. In his time, the currency of China, its writing, and measurements were standardized in order to have a unified  and centralized state.

After this unity was achieved, they could then engage in military conquests and construction projects, unitedly. In his time, all men were made to serve in the military for at least a year. Shihuang commanded respect from everyone, and failure to submit to him resulted in death.

i think the answer is b.