The Poor Soil of Tropical Rain Forests Is Due to

The poor soil of tropical rain forests is due to

A) poor quality substrate,such as bedrock that lacks iron and phosphorus.
B) intense sunlight bleaching the substrate.
C) lack of litter; the leaves never fall to the ground.
D) lack of freezing cold to break apart the substrate bedrock.
E) high temperatures that allow rapid decomposition and rapid recycling of nutrients.