A Young, Previously Healthy Drug Overdose Victim with Severely Depressed

A young, previously healthy drug overdose victim with severely depressed ventilation enters the emergency room with the following arterial blood gases: pH = 7.22, PaCO₂ = 70 mm Hg, HCO₃^-= 28 mEq/L.What is the acid-base disturbance of this victim?

A) Uncompensated respiratory acidosis
B) Compensated respiratory acidosis
C) Uncompensated respiratory alkalosis
D) Uncompensated metabolic acidosis