问题：
[单选题]_________ echo each other by Qian Trigram in the north and in the south of the Forbidden City.
AThe three halls.
BThe Three Rear Palaces.
CBoth the three halls and the Three Rear Palaces.
DNone of the answers.
[单选题]_________ echo each other by Qian Trigram in the north and in the south of the Forbidden City.
AThe three halls.
BThe Three Rear Palaces.
CBoth the three halls and the Three Rear Palaces.
DNone of the answers.
