**Core Concept**
The occipitofrontalis muscle is a paired muscle in the scalp that plays a crucial role in the movement of the scalp and the regulation of intracranial pressure. It is composed of two bellies, the frontalis and occipitalis, which are connected by a fibrous layer called the epicranial aponeurosis.

**Why the Correct Answer is Right**
The occipitofrontalis muscle is located in the subcutaneous layer of the scalp, which is the layer of connective tissue that lies beneath the skin and contains blood vessels, nerve endings, and other structures. The muscle's primary function is to elevate the eyebrows and to help regulate the movement of the scalp, allowing for changes in intracranial pressure. The epicranial aponeurosis, which connects the two bellies of the muscle, plays a crucial role in this function.

**Why Each Wrong Option is Incorrect**
**Option A:** The occipitofrontalis muscle is not located in the galea aponeurotica, which is a dense fibrous layer that lies beneath the subcutaneous layer.
**Option B:** The occipitofrontalis muscle is not located in the subaponeurotic layer, which is a layer of loose connective tissue that lies beneath the galea aponeurotica.
**Option C:** The occipitofrontalis muscle is not located in the pericranium, which is a layer of dense fibrous tissue that covers the outer surface of the skull.

**Clinical Pearl / High-Yield Fact**
The occipitofrontalis muscle is a key structure to recognize in the scalp, as it plays a crucial role in the movement of the scalp and the regulation of intracranial pressure. It is also an important landmark for surgeons and anesthesiologists when performing procedures in the scalp.

**Correct Answer:** C.