Why is the Yellow River (Huang He River) sometimes referred to as "China's sorrow" in Chinese history? es ) A) It is the final resting place of the last emperor of the Shang dynasty. B) The Yellow River served as the border physical and political border between China and the Mongols up until 1200 C. E. C) The sporadic flooding of the river has killed millions of people over the course of Chinese history dating back to 1500 B. C.E. D) The river's water is polluted due to ancient Chinese cultural practices and therefore could not be used for farming or as clean drinking​