A 40 Year-Old Obese Woman Complaining of Indigestion Was Admitted

A 40 year-old obese woman complaining of indigestion was admitted to the hospital for investigation. She had a past history of gallstones and transient attacks of jaundice. Large gallstones have been known to erode through the posterior wall of the gallbladder and enter the intestinal tract.
-Which part of the intestinal tract is likely to initially contain the stone?

A) The sigmoid colon
B) The descending colon
C) The transverse colon
D) The ascending colon
E) The jejunum