What was the official religion of the Ming Dynasty, and what were the purposes behind the construction of the Forbidden City and the Great Wall?
A) Official religion: Buddhism; Forbidden City: Religious ceremonies; Great Wall: Spiritual protection.
B) Official religion: Confucianism; Forbidden City: Political center; Great Wall: Defense against invaders.
C) Official religion: Daoism; Forbidden City: Residential palace; Great Wall: Agricultural development.
D) Official religion: Islam; Forbidden City: Cultural exchange; Great Wall: Economic prosperity.