**Core Concept**
Oral rehydration therapy (ORT) is a lifesaving intervention for the treatment of diarrhea, which works by replacing lost fluids, electrolytes, and salts in the body. The success of ORT depends on the intestinal mucosa's ability to absorb these essential nutrients.

**Why the Correct Answer is Right**
The intestinal mucosa contains specialized cells called enterocytes, which have microvilli that increase the surface area for absorption. The enterocytes express specific transport proteins, including sodium-glucose cotransporters (SGLTs), that facilitate the absorption of glucose and sodium ions. This process, known as co-transport, is essential for maintaining the proper balance of electrolytes and fluids in the body. The correct answer is **Na+/glucose co-transport**.

**Why Each Wrong Option is Incorrect**
* **Option A:** Prostaglandin synthesis is not directly related to the absorption of glucose and sodium in the intestinal mucosa.
* **Option B:** Gastric acid secretion is not a critical factor in the success of oral rehydration therapy.
* **Option D:** Pancreatic enzyme secretion is important for nutrient digestion, but not directly involved in the absorption of glucose and sodium.

**Clinical Pearl / High-Yield Fact**
Remember that the success of oral rehydration therapy depends on the presence of glucose in the intestinal lumen, which helps to drive the absorption of sodium ions.

**Correct Answer:** C. Na+/glucose co-transport