Identification of the causative microbe for a diarrheal infection often requires a stool culture. The best medium for this purpose is ____.
Select one:
A. A general purpose medium that supports the growth of the diverse gut microbiota
B. A liquid medium, as the diarrhea conditions are more liquid than solid
C. A medium containing a broad-spectrum antibiotic as a selective agent
D. A medium containing bile as a selective agent
E. A medium containing mammalian blood to provide extra growth factors