Four of the Five Answers Listed Below Are Characteristic of Desert

Four of the five answers listed below are characteristic of desert crusts. Select the exception.

A) ​form at the surface of desert soil
B) ​made up of living organisms, including cyanobacteria, lichens, mosses, and fungi
C) ​secrete organic molecules that are harmful to most other desert organisms
D) ​perform nitrogen fixation, making this nutrient available to plants
E) ​hold soil particles in place