Answer:
Thanks but the answer is true...
After the unification of China in the beginning of the Qin Dynasty, China's First Emperor, Qin Shihuang, linked the walls of the three northern states (Qin, Zhao, and Yan).
B. Sea life. This is because all of the other three options are very publicized, but sea life is not.
I believe they became important members in the Cold War.
