**Core Concept**
Choledochoduodenostomy is a surgical procedure that involves creating a direct connection between the common bile duct (CBD) and the duodenum. This procedure is often performed to bypass a stricture or obstruction in the bile ducts. In patients with a history of cholecystectomy, choledochoduodenostomy may be indicated to manage bile duct stones or other complications.

**Why the Correct Answer is Right**
The correct answer, C. Multiple stones were present in the CBD at the previous operation, is supported by the fact that choledochoduodenostomy is often performed to manage recurrent or persistent bile duct stones after cholecystectomy. This is because the gallbladder, which was removed, was a common site for the formation of gallstones, and the remaining CBD is at risk of developing stones. By creating a direct connection between the CBD and the duodenum, the risk of stone formation and obstruction is reduced.

**Why Each Wrong Option is Incorrect**
**Option A:** Hepatic metastasis were present. While hepatic metastasis may be a concern in patients with a history of cancer, it is not a common indication for choledochoduodenostomy. This procedure is typically performed to manage bile duct obstruction or stone disease, rather than metastatic disease.

**Option B:** Multiple stones were present in the gallbladder at the previous operation. While the presence of multiple gallstones may be a risk factor for developing bile duct stones, choledochoduodenostomy is not typically performed to manage gallbladder stones. Instead, it is performed to manage CBD stones that have formed after cholecystectomy.

**Option D:** The common hepatic duct had a stricture. While a stricture in the common hepatic duct may be an indication for surgical intervention, choledochoduodenostomy is typically performed to manage CBD stones or other complications, rather than strictures in the hepatic duct.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that choledochoduodenostomy is a palliative procedure that aims to relieve bile duct obstruction or stone disease, rather than treating the underlying cause. This procedure should be considered in patients with recurrent or persistent bile duct stones after cholecystectomy, and not as a primary treatment for other complications.

**✓ Correct Answer: C. Multiple stones were present in the CBD at the previous operation.**