challenge: According to historian Shi Quan, where was the city of Ying located?
  
  A. On the eastern coast of China, near the mouth of the Yangtze River
  B. In the upper reaches of the Man River basin to the east of the Han River
  C. Between the Ju and Zhang rivers, in the lower reaches of the modern-day Man River basin to the west of the Han River
  D. At the confluence of the Han and Yangtze rivers
  Answer: 