Based on the figure, which of the following conclusions is best supported by the data presented?
- A The soil conditions in the moist region are too extreme for most plant growth.
- B There is a linear relationship between the number of plant species and the soil condition in the dry region.
- C There is a positive correlation between plant species diversity and soil condition in the moist region.
- D Soil conditions are a better predictor of plant species diversity in the dry region than in the moist region.