**Core Concept**
The underlying principle being tested is the management of a bleeding duodenal ulcer, focusing on the surgical approach when endoscopic control fails. This involves understanding **duodenal anatomy** and the principles of surgical intervention for **upper GI bleeding**.

**Why the Correct Answer is Right**
Given the scenario where endoscopic control of bleeding from a duodenal ulcer is unsuccessful, surgical intervention is necessary. The best surgical approach in this context would typically involve a procedure that directly addresses the bleeding site, such as a **duodenotomy** to oversew the bleeding vessel, which is often the most effective way to control the hemorrhage.

**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because it does not specify a procedure that directly addresses the bleeding duodenal ulcer.
**Option B:** Similarly, this option does not outline a suitable surgical approach for managing a bleeding duodenal ulcer.
**Option C:** This choice is also incorrect as it does not describe an appropriate surgical method for controlling bleeding from a duodenal ulcer.
**Option D:** Without specifying, most surgical options not involving direct oversewing of the ulcer or a similar direct approach may not be the best choice.

**Clinical Pearl / High-Yield Fact**
In cases of massive hematemesis due to a duodenal ulcer, where endoscopic methods fail to control the bleeding, surgical intervention is crucial. The key is to quickly and effectively control the bleeding source, often through direct surgical repair.

**Correct Answer:** D. Oversewing of the bleeding vessel via duodenotomy.