**Core Concept**
The Glasgow Coma Scale (GCS) is a widely used neurological scale to assess the level of consciousness in a person following a head injury. The GCS score ranges from 3 to 15, with higher scores indicating better neurological function.

**Why the Correct Answer is Right**
A GCS score of 8 indicates a severe head injury. In the GCS, the motor component scores range from 1 to 6, with scores 4 and 5 indicating severe motor impairment. Since the patient has a GCS score of 8, their motor component score must be 4 or 5, indicating severe motor impairment. This, combined with the low verbal and eye-opening scores, classifies the head injury as severe.

**Why Each Wrong Option is Incorrect**
**Option A:** A GCS score of 8 cannot be classified as mild, as the lowest score for severe is 3-8, and mild is typically classified as 14 or 15.
**Option B:** Moderate head injuries are typically classified as GCS 9-12, so a score of 8 is more severe.
**Option D:** Very severe head injuries are typically classified as GCS 3-8, but the term "very severe" is not a standard classification in the GCS scoring system.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the GCS score is a valuable tool for assessing the severity of head injuries, but it should be used in conjunction with other clinical findings, such as CT scans and laboratory results, to determine the overall prognosis.

✓ Correct Answer: C. Severe