An elderly homeless woman is found unresponsive in the street, breathing rapidly. A blood gas analysis is performed with these results: pH 7.29, pCO2 18 mm Hg, pO2 100 mmHg, O2 saturation 99%, Na 145...

An elderly homeless woman is found unresponsive in the street, breathing rapidly. A blood gas analysis is performed with these results: pH 7.29, pCO2 18 mm Hg, pO2 100 mmHg, O2 saturation 99%, Na 145 mEq/l, Cl 90, HCO3 12. A likely cause of her acidosis is which of the following?

A. Hypoxia

B. Diarrhea

C. Methanol

D. Vomiting

E. Chronic obstructive pulmonary disease