When a patch of land is cleared in a tropical rainforest, the vegetation is often burned to enrich the soil with nutrients from the burned plant material. What description applies to this situation?

A) This works well because so many nutrients are trapped in tropical plants.
B) This works for a few years, but the soil is soon depleted of nutrients.
C) This isn't necessary because tropical soils are filled with nutrients.
D) This helps to promote long-term sustainable agriculture.