**Core Concept**
Post-mortem luminescence refers to the glowing appearance of a body after death, which can be caused by the ingestion of certain substances. This phenomenon is a result of the breakdown of these substances within the body, leading to the production of light.

**Why the Correct Answer is Right**
The correct answer is associated with the breakdown of a bioluminescent compound in the body. This compound is ingested and then broken down by enzymes, resulting in the production of light. The specific compound responsible for this effect is a type of marine biotoxin that is found in certain types of seafood.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not relate to the production of light after death.
**Option B:** This option is incorrect because it is not associated with bioluminescence.
**Option C:** This option is incorrect because it is not directly related to post-mortem luminescence.

**Clinical Pearl / High-Yield Fact**
The most common cause of post-mortem luminescence is the ingestion of a biotoxin found in certain types of seafood, particularly those that contain dinoflagellates. This can be a useful clue in forensic pathology investigations.

**Correct Answer:** C.