Answer:
The answer is "Option a".
Step-by-step explanation:
In 230 B.C., the Qin dynasty formulated the very first Chinese empire, in which six Zhou monarchies became surrounded by the Qin leadership. It's only immediately around 221 and 206 B.C.; however the Qin dynasty would have a significant cultural influence on the subsequent dynasties, that's why in Chinese history, the first truly united administration was the Qin Dynasty.