What was the location of the ruins of Haojing, according to archaeological discoveries?

A. South bank of the Wei River in present-day Luoyang, Henan Province
B. East bank of the Yellow River in present-day Beijing
C. West bank of the Yangtze River in present-day Nanjing, Jiangsu Province
D. North end of Doumen Subdistrict in present-day Xi'an, Shaanxi Province, next to the Feng River
Answer: 