Which of the following is NOT correct with respect to the species of Frankia?

A) It belongs to the phylum Actinobacteria.
B) It can live as an endophyte in the roots of some vascular plants, where it fixes nitrogen.
C) Some species can protect plants, such as wheat, from fungal infection.
D) Some species can grow as saprophytes on dead leaf litter.
E) Some species have been found to form spores.