Since then the Great Wall was built, rebuilt to protect the northern borders of the Chinese Empire from the Hun's and Mongolian attacks during the rule of successive dynasties.
i believe the answer is c.
İn the Hindus have a polytheistic believe. And public have a 4 class. Hindus have a idolartic believe and Buddhists reactions for believe idolartic. Buddhizm equality in the public but Hinduz have a classes. Buddhists love the fun and funny activites but Hindus dont like this.
Good lessons ;)
Answer:I
If you mean by 21st century then, having awesome medical people
Explanation:
A lot of contries don't have a lot of medical staff, but the US has hired very good medical staff.