**Core Concept**
The duodenum, the first part of the small intestine, receives blood supply from various arteries that branch off from the abdominal aorta. This arterial supply is crucial for the digestion and absorption of nutrients in the duodenum.

**Why the Correct Answer is Right**
The arterial supply of the duodenum is primarily through the superior mesenteric artery (SMA). The SMA arises from the abdominal aorta and gives off several branches, including the jejunum and ileum arteries, but the main branch that supplies the duodenum is the superior pancreaticoduodenal artery. This artery anastomoses with the inferior pancreaticoduodenal artery, which arises from the superior mesenteric artery, to form a rich arterial network that provides blood supply to the duodenum. This network is essential for maintaining the duodenum's function and integrity.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we cannot evaluate its correctness.
* **Option B:** This option is also not provided, so we cannot evaluate its correctness.
* **Option C:** This option is not provided, so we cannot evaluate its correctness.

**Clinical Pearl / High-Yield Fact**
The arterial supply of the duodenum is a classic exam trap, and students should remember that the superior mesenteric artery is the primary supplier of blood to the duodenum. The anastomosis between the superior and inferior pancreaticoduodenal arteries is crucial for maintaining blood flow to the duodenum.

**Correct Answer: D. Superior mesenteric artery.**