Your roommate has an infection and went to the brocker health center for antibiotics. three days later (after taking the antibiotics he isn't feeling any better and returns to the doctor. the doctor tells him that the bacteria causing his infection must be resistant to the antibiotic being used. you know that the bacterial structure that could cause this problem is/are the
a. plasmids
b. capsule
c. pili
d. flagellum
e. spores