What is the treatment for Clostridium difficile-associated diarrhea?

The most commonly used therapy for recurrent diarrhea with positive test for C. difficile is the administration of a second round of the same antibiotic used in the first episode.
Antiperistaltic agents and opioid analgesics should be avoided due to the delay they cause in the elimination of toxins.
Severe pseudomembranous colitis occurs only in 1-2% of patients with C. difficile-associated disease, but is associated with a high mortality rate (50%).
a) Only I is correct.
b) II and III are correct.
c) I, II, and III are correct.