The correct option is A. Qin Shihuangdi's goal for the Qin dynasty to begin building the Great Wall and gain public support.
Emperor Qinshihuang commanded the building of the Great Wall after the Qin Dynasty's (221-206 BC) grand unification in 221 BC to stave off assaults from the Mongolians and Manchus.
Why was the Great Wall of China built and was it successful in its purpose?
The Chinese constructed the Great Wall as a masterwork of defensive engineering. While Chinese forces guarding these defenses undoubtedly assisted in deterring some would-be invaders from attacking, it was by no means impregnable. In other words, it occasionally contributed to China's protection and sometimes didn't.
The many regions were brought together into a single empire by the Qin Dynasty. Emperor Qin Shi Huang had all the walls connected in order to stave off attacks from northern invaders. The Great Wall was created as a result.
Learn more about the Qin dynasty here:
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