A healthy 32-year-old woman undergoes pulmonary exercise stress testing prior to starting a training regimen in preparation for her first marathon.Normally, during moderate aerobic exercise, which of the following occurs?

A healthy 32-year-old woman undergoes pulmonary exercise stress testing prior to starting a training regimen in preparation for her first marathon.Normally, during moderate aerobic exercise, which of the following occurs?
A.Alveolar ventilation increases
B.Arterial lactate level increases
C.PaCO2 decreases
D.PaO2 increases
正确答案：Alveolar ventilation increases