You Are Weeding Your Garden When You Accidentally Expose Some

You are weeding your garden when you accidentally expose some roots. You notice swellings (root nodules) on the roots. Most likely your plant

A) suffers from a mineral deficiency.
B) is infected with a parasite.
C) is benefiting from a mutualistic bacterium.
D) is developing offshoots from the root.
E) contains developing insect pupa.