**Core Concept**
The Cushing reflex, also known as the Cushing phenomenon, is a physiological nervous system response to increased intracranial pressure (ICP). It is characterized by a triad of symptoms: hypertension, bradycardia, and irregular breathing. This reflex is mediated by the brainstem and involves the activation of the sympathetic nervous system.

**Why the Correct Answer is Right**
The Cushing reflex is triggered by a sudden increase in ICP, which leads to the activation of mechanoreceptors in the brainstem. These mechanoreceptors detect the increased pressure and send signals to the vasomotor center, stimulating the release of vasopressor hormones such as adrenaline and noradrenaline. The subsequent increase in systemic vascular resistance and cardiac output results in hypertension. Concurrently, the parasympathetic nervous system is activated, leading to bradycardia and irregular breathing. This reflex is an essential mechanism for maintaining cerebral perfusion pressure and preventing further increases in ICP.

**Why Each Wrong Option is Incorrect**
**Option B:** Cushing disease is a rare endocrine disorder caused by an overproduction of adrenocorticotropic hormone (ACTH), leading to excess cortisol production. It is not related to the maintenance of blood pressure according to intracranial pressure.

**Option C:** Starling's reflex refers to the mechanism by which the heart rate increases in response to increased venous return and decreased ventricular filling. While it is an important physiological response, it is not directly related to the maintenance of blood pressure according to intracranial pressure.

**Option D:** Gometz reflex is not a recognized physiological response or reflex in medical literature. It is likely a distractor intended to test the student's knowledge of the Cushing reflex.

**Clinical Pearl / High-Yield Fact**
It is essential to recognize the Cushing reflex in clinical settings, as it can be a sign of increased ICP, which may indicate conditions such as intracranial hemorrhage, cerebral edema, or other space-occupying lesions. The Cushing reflex is often accompanied by other signs such as papilledema, altered mental status, and pupillary changes.

**Correct Answer Line**
✓ Correct Answer: A. Cushing reflex