Critical Reasoning (CR) | A study compared the energy expenditures of professional bicycle racer

A study compared the energy expenditures of professional bicycle racers and average recreational bicycle riders while climbing a hill. Surprisingly, the professional bicycle riders not only reached the top of the hill significantly quicker than the recreational cyclists but also expended at least 20% less energy while doing so.

Which of the following hypotheses best explains why the professional cyclist performed faster, but used less energy?

A. Hill climbing is considered one of the most important
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