**Core Concept**
Spongiform degeneration of the cerebral cortex refers to a specific type of neuronal degeneration characterized by the formation of vacuoles and a sponge-like appearance of the brain tissue. This condition is associated with the accumulation of misfolded prion proteins, leading to neuronal damage and loss.

**Why the Correct Answer is Right**
The correct answer is associated with Creutzfeldt-Jakob disease (CJD), a rare and fatal neurodegenerative disorder caused by the accumulation of abnormal prion proteins in the brain. This process leads to spongiform degeneration of the cerebral cortex, characterized by the formation of numerous vacuoles and a loss of neuronal connections. The misfolded prion proteins trigger a cascade of cellular events, including apoptosis and inflammation, ultimately resulting in the death of neurons.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly associated with spongiform degeneration of the cerebral cortex. While Alzheimer's disease is a neurodegenerative disorder, it is characterized by the accumulation of amyloid beta plaques and tau protein tangles, rather than prion proteins.

**Option B:** This option is incorrect because it refers to a different type of neurodegenerative disorder. Huntington's disease is characterized by the expansion of CAG repeats in the Huntingtin gene, leading to the formation of protein aggregates and neuronal degeneration.

**Option C:** This option is incorrect because it is not directly associated with spongiform degeneration of the cerebral cortex. While amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder, it is characterized by the degeneration of motor neurons, rather than the accumulation of prion proteins.

**Clinical Pearl / High-Yield Fact**
Creutzfeldt-Jakob disease (CJD) is a rare and fatal neurodegenerative disorder with a characteristic "spongiform" appearance of the brain tissue. It is associated with the accumulation of misfolded prion proteins, which can be transmitted through contaminated medical instruments or through contact with infected tissue.

**Correct Answer: C. Creutzfeldt-Jakob disease.**