Which of the Following Occurs the 6 Hours After You

Which of the following occurs the 6 hours after you fly from New Orleans, Louisiana, to Aspen, Colorado (7890 feet, barometric pressure = 564 mm Hg)? $\begin{array}{|l|l|l|l|l|l|l|}\hline&\text { Minute } & \text { Arterial } & \text { Arterial } & \text { Blood } & \text { Arterial } & \text { Hemoglobin } \\&\text { Ventilation } & \mathrm{PO}_{2} & \mathrm{PCO}_{2} & \mathrm{pH} & \mathrm{HCO}_{3}^{-} &\\\hline \mathrm{A} & & \uparrow & \uparrow & \uparrow & \uparrow & \uparrow \\\hline \mathrm{B} & \uparrow & \uparrow & \downarrow & \downarrow & \downarrow & \leftrightarrow \\\hline \mathrm{C} & \uparrow & \downarrow & \uparrow & \uparrow & \uparrow & \uparrow \\\hline \mathrm{E} & \uparrow & \downarrow & \downarrow & \leftrightarrow & \leftrightarrow & \uparrow \\\hline \mathrm{E} & \uparrow & \downarrow & \uparrow & \leftrightarrow & \downarrow & \uparrow \\\hline \mathrm{F} & \uparrow & \downarrow & \downarrow & \uparrow & \downarrow & \leftrightarrow \\\hline \mathrm{G} & \uparrow & \downarrow & \uparrow & \downarrow & \downarrow & \uparrow \\\hline\end{array}$