**Core Concept**
The postprandial motility refers to the increased movement of the gastrointestinal tract after a meal, which is essential for proper digestion and nutrient absorption. This process involves the coordination of various gastrointestinal hormones, neural pathways, and muscular contractions to facilitate the movement of food from the stomach to the small intestine.

**Why the Correct Answer is Right**
The correct answer is related to the phase of the migrating motor complex (MMC) that is triggered after a meal. The MMC is a cyclical pattern of gastrointestinal motility that occurs in the fasting state and is disrupted after food intake. The postprandial motility is characterized by a rapid increase in gastric contractions and antral contractions, which helps to mix food with digestive enzymes and move it into the small intestine for further digestion and absorption. This process is mediated by the release of gastrointestinal hormones such as gastrin, cholecystokinin, and secretin, which stimulate gastric contractions and pancreatic enzyme secretion.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a particular phase of the MMC that is triggered after a meal.
* **Option B:** This option is incorrect because it refers to the fasting state, when the MMC is active, but not the postprandial state.
* **Option C:** This option is incorrect because it is not a specific phase of the MMC that is triggered after a meal.

**Clinical Pearl / High-Yield Fact**
The migrating motor complex is a critical process that helps to clear the stomach of food remnants and bacteria, reducing the risk of gastrointestinal complications such as ulcers and infections.

**Correct Answer:** C.