According to the presentation theory, VO2 max is influenced by:

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The concept surrounding VO2 max, or maximal oxygen uptake, centers on the body's ability to transport and utilize oxygen during intense exercise. The key factor highlighted in choice B is the capability of the body’s cardiorespiratory system to deliver oxygen. This capability includes how effectively the heart pumps blood, the integrity of the blood vessels, and the efficiency of the lungs in exchanging gases.

When evaluating VO2 max, it is crucial to understand that it represents not only the amount of oxygen available but relies heavily on how efficiently the cardiorespiratory system can move oxygen from the atmosphere into the bloodstream and deliver it to the working muscles. A stronger heart with a greater stroke volume and improved blood flow enhances oxygen delivery, which directly impacts VO2 max.

Other factors, while related, do not foremost influence VO2 max in this context. For example, while oxygen availability is essential, it does not account for how well the body can utilize the oxygen once it is delivered. Muscle adaptation factors into overall performance and efficiency but is secondary to the delivery capabilities of the cardiorespiratory system. Dietary intake may support overall health and performance but is not a direct determinant of VO2 max in comparison to the roles played by the cardiorespiratory system.

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