**Core Concept**
The lesser sac, also known as the omental bursa, is a peritoneal cavity located behind the stomach and the liver. Its boundaries are essential to identify during surgical procedures and anatomical studies. The lesser sac is a potential space that can be opened surgically to access the posterior surface of the stomach, the liver, and the pancreas.

**Why the Correct Answer is Right**
The correct answer specifies the boundaries of the lesser sac, which include the stomach (anteriorly), the liver (inferiorly), the diaphragm (superiorly), and the peritoneum along the inferior surface of the liver (posteriorly). The hepatogastric ligament, containing the hepatic artery, portal vein, and bile duct, forms the hepatogastric ligament, which separates the lesser sac from the greater sac. The hepatoduodenal ligament, containing the common bile duct, hepatic artery, and portal vein, forms the posterior wall of the lesser sac.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the correct boundaries of the lesser sac.
**Option B:** This option is incorrect because it does not accurately describe the boundaries of the lesser sac.
**Option C:** This option is incorrect because it does not specify the correct boundaries of the lesser sac.

**Clinical Pearl / High-Yield Fact**
The lesser sac is a potential space that can be opened surgically to access the posterior surface of the stomach, the liver, and the pancreas. It is essential to identify the boundaries of the lesser sac during surgical procedures to avoid damaging surrounding structures.

**Correct Answer: D. The stomach (anteriorly), the liver (inferiorly), the diaphragm (superiorly), and the peritoneum along the inferior surface of the liver (posteriorly).**