Which Statement Is True of Small Intestinal Bacterial Overgrowth

Which statement is true of small intestinal bacterial overgrowth?

A) The patient is exposed to the contaminated instruments during surgery.
B) Cross-contamination of bacteria occurs from the colon to the small intestine.
C) The colon is perforated, and bacteria enter the peritoneum.
D) The surgical incision becomes infected because of bacterial overgrowth.
E) The patient passes excess bacteria from the stomach to the small intestine.