The purpose of the the great wall of china, as originally constructed by the qin dynasty, was to a) prevent immigration. b) prevent foreign invasion. c) show the greatness of the emperor. d) divide the empire into rival states.

The second alternative is correct (B).

The Great Wall of China, also called the Great Wall, corresponds to an intriguing architectural construction built in Imperial China's time for military purposes.

The construction of the Wall began in the year 220 BC and its conclusion occurred only in the sixteenth century in the Ming dynasty. The military purpose of the Wall of China was to prevent the entry of nomadic tribes from Mongolia and Manchuria, this construction intended to defend the north of the country against such invaders.

it affected it because the kingdoms (with trade) slowly got richer and richer.