During Adulthood, What Happens to the Body's Ability to Take

Multiple Choice

During adulthood, what happens to the body's ability to take in and transport oxygen to various body organs (VO₂ max) ?

A) When measured at rest, VO₂ max minimally declines with age, but during exercise, there is systematic decline of VO₂ max beginning between ages 35 and 40.
B) When VO₂ max is measured at rest, there is a systematic decline of about 1% per year, but during exercise there is minimal decline in capacity.
C) Primary aging causes an increase in VO₂ max during both rest and exercise, although the greatest increases are found during exercise conditions.
D) As women age, their VO₂ max decreases during rest and exercise conditions, but as men age, their VO₂ max improves under rest and exercise conditions.