The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
<span>Humans have the ingenuity to use/adapt to another resource when another shows signs of depletion</span>
She must wear a mask and gloves.
The mask would prevent her from inhaling pathogens that get transferred viraly, while latex gloves would prevent pathogens from entering through her skin, or if she later decides to put her fingers in her mouth or anything similar.
If she has a wound on her hands, the gloves will also prevent the blood from mixing with her own and prevent disease.
The answer is A) Asteroid hope it helps
