Increasing the FIO₂ in Patients With $\dot{V}_{A} /\dot {Q} c$

Increasing the FIO₂ in patients with $\dot{V}_{A} /\dot {Q} c$ mismatch will have which of the following effects?

A) It will not improve PaO₂.
B) It will cause little improvement in PaO₂.
C) It will improve PaO₂.
D) It will decrease PaO₂.