After Completing a Course of Antibiotics That Target Peptidoglycan, a Patient

Multiple Choice

After completing a course of antibiotics that target peptidoglycan, a patient is still suffering from diarrhea.Which would not be a reasonable explanation?

A) The diarrhea is being caused by a eukaryotic microorganism.
B) The bacterium has formed a biofilm, shielding it from antibiotics.
C) The bacterium responsible is from the mycoplasma group of bacteria.
D) The bacterium has acquired antibiotic resistance through lateral gene transfer.
E) The patient is infected with several different Gram-positive bacteria that are not susceptible to this antibiotic.