## Core Concept
In cases of death due to asphyxia, it's crucial to follow a specific autopsy protocol to prevent contamination of potential evidence. Asphyxia refers to a condition of being unable to breathe or obtain sufficient oxygen, often leading to death. The autopsy process involves careful dissection and examination of the body to determine the cause of death.

## Why the Correct Answer is Right
The correct approach in autopsy for asphyxial deaths involves dissecting the body in a manner that prevents potential evidence, such as petechial hemorrhages or other signs of asphyxia, from being obscured or contaminated. The **cranial cavity** is typically dissected last in such cases. This is because manipulation of the body during dissection can cause artifacts or changes that might mimic signs of asphyxia. By dissecting the cranial cavity last, the risk of contamination or alteration of potential evidence within the brain or its coverings is minimized.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because dissecting the abdominal cavity first does not necessarily interfere with the signs of asphyxia directly related to the head or neck region.
- **Option B:** Similarly, this option does not specify a region that, when dissected first, would directly interfere with evidence related to asphyxial deaths in a critical manner.
- **Option D:** This option suggests dissecting a specific area without providing a clear reason why it would be inappropriate to dissect it last in the context of asphyxial deaths.

## Clinical Pearl / High-Yield Fact
A key point to remember in the context of asphyxial deaths and autopsy procedures is the importance of preserving potential evidence. The sequence of dissection can significantly impact the integrity of findings. Therefore, understanding the correct sequence, particularly dissecting the **cranial cavity last**, is crucial for accurate post-mortem analysis.

## Correct Answer: C.