The Primary Regulator of the Magnitude of Ventilation Under Normal $P _ { o _ { 2 } }$

The primary regulator of the magnitude of ventilation under normal circumstances is

A) The H⁺ concentration in the brain extracellular fluid, which is monitored by central chemoreceptors
B) The $P _ { o _ { 2 } }$ of the arterial blood, which is monitored by central chemoreceptors
C) The $P _ { o _ { 2 } }$ of the arterial blood, which is monitored by peripheral chemoreceptors
D) The H+ concentration in the arterial blood, which is monitored by central chemoreceptors