China's topography is high in the west and low in the east, showing a three-stage distribution. The influence of this terrain on the climate in China is conducive to the warm and humid air flow on the ocean going deep into the inland of China and forming abundant precipitation; The impact on rivers is that most rivers flow eastward, connecting east and west traffic. At the junction of stairs, there is a big river drop, which is rich in water. The lack of tourism resources in China has nothing to do with topography.
Therefore, choose: d.