**Core Concept**
The stomach receives its blood supply from branches of the aorta that run along its surface and penetrate the stomach wall. This blood supply is crucial for the stomach's function in digestion and secretion of gastric juices.

**Why the Correct Answer is Right**
The stomach is primarily supplied by the left gastric artery, which is a branch of the celiac trunk. The left gastric artery runs along the lesser curvature of the stomach and gives off several branches that penetrate the stomach wall. These branches provide oxygen and nutrients to the gastric mucosa, which is essential for the secretion of gastric juices and the digestion of food. The left gastric artery also receives contributions from the right gastric artery, which runs along the greater curvature of the stomach. The blood supply to the stomach is also facilitated by the short gastric arteries and the gastroepiploic arteries, which originate from the splenic artery.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the left gastric artery is the primary supplier of the stomach, not the hepatic artery.
**Option B:** This option is incorrect because the splenic artery primarily supplies the spleen and the pancreatic tail, not the stomach.
**Option C:** This option is incorrect because the superior mesenteric artery primarily supplies the small intestine, not the stomach.

**Clinical Pearl / High-Yield Fact**
The stomach's blood supply is unique in that it has two separate circulations: the left gastric artery supplies the stomach's lesser curvature, while the right gastric and gastroepiploic arteries supply the stomach's greater curvature. This dual circulation is crucial for the stomach's function and is an important consideration in surgical procedures involving the stomach.

**Correct Answer: A. Left gastric artery.