Problem: The patient with cancer reports having five liquid stools this morning after being on an antibiotic for a recurrent sinus infection. The patient completed the fourth cycle of chemotherapy for multiple myeloma 2 weeks ago. The patient states having some abdominal pain intermittently, but no cramping. No blood in the stool is reported. Which test would be ordered to evaluate diarrhea? Need Professional Help? A. Complete blood count B. Renal function panel C. Liver function tests D. Stool specimen for C. difficile