**Core Concept**
Tram line bruises, also known as "tram track" or "railroad track" bruises, are a type of skin injury characterized by linear, parallel marks or streaks. This phenomenon occurs due to shearing forces that cause the skin to be torn in a linear fashion, resulting in the characteristic tram line pattern.

**Why the Correct Answer is Right**
Tram line bruises are typically caused by road traffic accidents, where the skin is subjected to shearing forces as the vehicle moves over a bump or a pothole. This shearing force causes the skin to be stretched and torn, resulting in the linear bruises. The pattern of the bruises can be attributed to the direction of the force applied to the skin, which in this case is perpendicular to the direction of the vehicle's movement.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as tram line bruises are not caused by blunt trauma, which would result in a more diffuse or patchy pattern of injury.
* **Option B:** This option is incorrect as tram line bruises are not a result of direct compression or crushing forces, which would cause a different type of injury.
* **Option C:** This option is incorrect as tram line bruises are not a result of thermal injuries, which would cause burns or charring of the skin.

**Clinical Pearl / High-Yield Fact**
Tram line bruises are a classic example of a shearing injury, which can occur in a variety of settings, including road traffic accidents, falls, or other mechanisms of injury where the skin is subjected to shearing forces.

**Correct Answer: C.**