Which river flows through Dongguan, Dongjiang, Beijiang or Xijiang?

The middle reaches of the Yellow River flow through the Loess Plateau. Due to serious soil erosion, river sediment has greatly increased. The lower reaches are on the North China Plain. The riverbed is wide and flat, the water flow is slow, and a lot of sediment is deposited, which makes the riverbed rise and become a world-famous surface river. There is basically no tributary inflow, and the basin area is small.

Therefore, choose: B.