**Core Concept**
The blast wave generated by an explosion is a high-pressure shockwave that can cause damage to organs and tissues. The organs' vulnerability to the blast wave depends on their anatomical location, blood supply, and ability to withstand pressure changes.

**Why the Correct Answer is Right**
The brain is relatively protected from the blast wave due to its encasement within the skull. The cranial vault acts as a shock-absorbing structure, reducing the impact of the blast wave on the brain. Additionally, the brain's blood supply is relatively isolated from the external environment, which helps to minimize damage. The blast wave is more likely to cause damage to organs with a direct path of transmission, such as the lungs, liver, and spleen.

**Why Each Wrong Option is Incorrect**
* **Option A:** The heart is not the correct answer because it is relatively protected by the rib cage and mediastinal structures. However, it can still be affected by the blast wave, particularly if there is a direct hit or if the individual is in a prone position.
* **Option B:** The kidneys are not the correct answer because they are relatively protected by the rib cage and surrounding musculature. However, they can still be affected by the blast wave, particularly if there is a direct hit or if the individual has pre-existing renal disease.
* **Option C:** The lungs are not the correct answer because they are actually one of the most vulnerable organs to the blast wave. The blast wave can cause pulmonary barotrauma, including pneumothorax and hemorrhage.

**Clinical Pearl / High-Yield Fact**
In blast injuries, the triad of symptoms often includes "the 4Ds": deafness, dyspnea, diarrhea, and dizziness. This triad is a result of the blast wave's effects on the ears (deafness), lungs (dyspnea), gastrointestinal system (diarrhea), and inner ear (dizziness).

**Correct Answer:** C.