Answer: A) It introduced Confucianism and Buddhism.
Explanation:
Confucianism had been the official religion of the Han Dynasty in China since the 2nd century BCE. The Han Dynasty passed Buddhism and then Confucianism to Korea, presumably through the Chinese commanderies that conquered the northern region.
Although Buddhism became the official religion of Korea, Confucianism´s principles were embraced and practiced by the lower classes, the government, and public matters.
