Stimuli or Conditions That Would Tend to Increase Ventilation Include $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$

Stimuli or conditions that would tend to increase ventilation include

A) Lower than normal blood $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$
B) Higher than normal blood pH
C) Breathing carbon monoxide
D) Iron-deficiency anemia
E) Breathing air with reduced $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$