Which Root Adaptation Enables Plants to Access Atmospheric Nitrogen

Which root adaptation enables plants to access atmospheric nitrogen?

A) root nodules that are colonized by bacteria
B) a mutualistic relationship with fungi
C) stomata that allow the diffusion of nitrogen through the epidermis of the leaf
D) thin cell membranes that are porous enough to allow for the diffusion of nitrogen into the root system
E) bacteria that live within the leaves of the plants that absorb nitrogen and make it available for the plant