**Core Concept**
Pulmonary ventilation refers to the process of air moving into and out of the lungs, primarily driven by the contraction and relaxation of the diaphragm and intercostal muscles. This process is essential for gas exchange, where oxygen is absorbed into the bloodstream and carbon dioxide is removed.

**Why the Correct Answer is Right**
The correct answer is related to the fact that the diaphragm is the primary muscle responsible for inspiration. During inspiration, the diaphragm contracts and flattens, increasing the volume of the thoracic cavity and allowing air to flow into the lungs. The intercostal muscles also contribute to inspiration by elevating the ribs and increasing the chest cavity's volume. This action creates a pressure gradient that allows air to enter the lungs.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the primary muscle responsible for pulmonary ventilation.
**Option B:** This option is incorrect because it is not a true statement regarding pulmonary ventilation.
**Option C:** This option is incorrect because it is not a characteristic of pulmonary ventilation.

**Clinical Pearl / High-Yield Fact**
The diaphragm is the primary muscle responsible for inspiration, and its contraction is essential for increasing the volume of the thoracic cavity and allowing air to flow into the lungs. This is a critical concept for understanding respiratory physiology and pathophysiology.

**Correct Answer:** C.