Which Factors May Result in a Normal Microbiota Species Causing

Which factors may result in a normal microbiota species causing disease?

A) dysbiosis due to antibiotic therapy or invasion of other tissues by the microbiota species
B) immune system attack on the host's own tissues
C) dysbiosis due to antibiotic therapy
D) dysbiosis due to antibiotic therapy or immune system attack on the host's own tissue
E) invasion of other tissues by the microbiota species