Those who participate in risky sports often do so to confront their fears. For example, rock climbers are more likely than others to have once suffered from a fear of heights. Those who participate in such risk-taking activities also have more self-confidence than others, so it is probably true that confronting one' s fears increases one' s self-confidence. Which one of the following, if true, most weakens the reasoning above? ["Participating in risky sports is not the only way to confront one's fears.", 'In general, people who currently participate in risky sports had above-average self-confidence even before participating in any risky sport.', 'Most of those who do not participate in risky sports believe that they lack the capacity to excel in such activities.', 'Most people who refrain from engaging in risky sports refrain from doing so for reasons other than a fear of death or injury.']