How did the qin state become dominant in china?
a. through cooperation with neighboring states
b. by genocide aimed at other strong states
c. by the gradual conquest of other states
d. through its diplomacy that encouraged allies to

The Qin State became dominan in China C. BY THE GRADUAL CONQUEST OF OTHER STATES.

Qin rulers conquered every region under the Zhou empire. They also conquered outlying southern regions up to Vietnam and northern regions towards Korea. 

The coast of north america , basically yes newfoundland , i would say c , good luck

If u can translate that to english i will surely you!