In a Comparison of Physically Fit and Unfit People, Which $\dot V$

Multiple Choice

In a comparison of physically fit and unfit people, which of the following statements are true?
I.The maximum heart rates of physically fit and unfit people of the same age are considerably different.
II.The maximum heart rates of physically fit and unfit people of the same age are the same.
III.Physically conditioned and unconditioned people performing the same amounts of work consume the same amounts of oxygen.
IV.The $\dot V$ O₂ is linearly related to the work rate regardless of conditioning, age, or gender.

A) II, III, IV
B) I, III, IV
C) I, II, III, IV
D) I, II, III