What are the diagnostic tests for diarrhea and colitis associated with C. difficile?

The diagnosis should be suspected in a patient with diarrhea or abdominal pain who has received antibiotics in the previous 3 months or within 72 hours of hospitalization.
The diagnosis is confirmed by demonstrating toxigenic C. difficile (toxin A or B) in a fresh stool sample from a patient with obvious diarrhea during or after the use of an antimicrobial agent.
The detection of C. difficile in non-diarrheal stool samples is recommended to identify asymptomatic carriers.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only I and III are correct.
d) All statements are incorrect.
e) All statements are correct.