The correct answer is C) The Chinese learned about Buddhism through trade with other cultures.
Buddhism reached China in the first place because the Chinese learned about Buddhism through trade with other cultures.
Siddhartha Gautama Buddha founded Buddhism in India around 500 BC. He was the son of a great King but he did not find happiness in richness or power. So he left the palace and his family to travel alone for six years, practicing meditation and fasting until he found enlightenment. THen he taught his Four Noble Truths.
Buddhism teachings arrived in China to trade with other cultures, such as the Indian. Buddhism spread along the SIlk route, that was the most famous commerce route in that ancient time. Historians consider that Buddhism reached China during the Han Dynasty.