Coach Taylor is trying to explain the negative side effects smoking has to athletic performance. Which of these options include both a scientific model and a connection to Coach Taylor’s topic of athletic performance?

A diagram is a scientific model because it represents how blood moves through the body. Comparing oxygen-rich blood in a non-smoker with blood carrying less oxygen in a smoker shows how smoking can reduce oxygen delivery to the body, which can make athletic activity harder. Choice C is the diagram comparing blood flow in smokers and non-smokers.

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