**Core Concept**
The **dorsal mesentery** is a layer of tissue that attaches the **hindgut** to the posterior body wall during embryonic development. It plays a crucial role in the formation of various abdominal structures. The **greater omentum**, a significant structure in the abdominal cavity, also originates from the dorsal mesentery.

**Why the Correct Answer is Right**
The correct answer is related to the development of the **greater omentum**, which is a large fold of tissue that hangs down from the stomach. The **greater omentum** develops from the dorsal mesentery, specifically from the part that folds over the stomach and intestines. This structure is essential for supporting the abdominal organs and facilitating the movement of the intestines.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe a structure that develops from the dorsal mesentery.
**Option B:** This option is also incorrect as it is not directly related to the development from the dorsal mesentery.
**Option C:** Similarly, this option does not correctly identify a structure derived from the dorsal mesentery.

**Clinical Pearl / High-Yield Fact**
The **greater omentum** is a significant structure that can become involved in various pathological processes, including inflammation and tumor metastasis. Understanding its development from the dorsal mesentery is essential for comprehending its role in abdominal anatomy and pathology.

**Correct Answer:** D. Greater omentum.