Respuesta :
It was originally constructed to prevent foreign invasion, specifically from the Mongolians. Hope this helps!
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.