Which possible reasons does the nurse identify that contribute to the patient's black stools?

A) Takes ferrous sulfate 325 mg PO BID.
B) Hemorrhoids are irritated and bleeding.
C) Bleeding from a perforated gastric ulcer.
D) Incomplete small bowel obstruction.
E) Development of a Clostridium difficile infection.

Ferrous Sulfate

An iron supplement used to treat or prevent low blood levels of iron (such as those caused by anemia or pregnancy).

Gastric Ulcer

A sore on the lining of the stomach caused by inflammation, often resulting from infection with H. pylori bacteria or long-term use of NSAIDs.

Small Bowel Obstruction

A medical condition where there is a blockage in the small intestine, preventing the normal passage of contents through the digestive tract.