**Core Concept**
Cholecystokinin (CCK) is a **hormone** released by the duodenum in response to food intake, particularly **fats** and **proteins**. It plays a crucial role in **digestion** by stimulating the release of **bile** from the gallbladder and **enzymes** from the pancreas.

**Why the Correct Answer is Right**
Given the correct answer is not specified, let's discuss the general actions of CCK. CCK stimulates the gallbladder to contract, releasing **bile** into the intestine to facilitate **fat digestion**. It also stimulates the pancreas to release **digestive enzymes**.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, we can't determine its incorrectness directly.
**Option B:** Similarly, without the option, we can't comment on its validity.
**Option C:** And the same goes for this option.
**Option D:** This option's incorrectness would depend on the specific action attributed to it.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that CCK helps in the digestion of fats and proteins by stimulating the release of bile and pancreatic enzymes, respectively.

**Correct Answer:**