What effect does hypoventilation have on ICP?

Hypoventilation reduces the removal of carbon dioxide (CO2) from the bloodstream. As CO2 levels rise due to inadequate ventilation, this condition can result in hypercapnia. Elevated CO2 concentrations in the blood cause vasodilation of cerebral blood vessels, which subsequently increases cerebral blood volume. This increase in blood volume in the cranial cavity raises intracranial pressure (ICP). Therefore, hypoventilation leads to a direct increase in ICP by inducing vasodilatory effects from rising CO2 levels, making the chosen answer a clear and accurate reflection of the physiological response associated with hypoventilation.