Which argument best analyzes why relying exclusively on exercise is often a poor standalone strategy for sustained weight loss?

Because exercise burns zero calories unless combined with a specific supplement, so relying on exercise is physiologically impossible without pharmacologic augmentation.

Because only high-intensity interval training (HIIT) works for fat loss, and all other exercise modalities are counterproductive without surgery.

Because exercise always leads to weight gain due to increased muscle glycogen storage, making diet irrelevant.

Because exercise can increase hunger and caloric intake, is time-consuming to match large caloric surpluses, and may be less sustainable than dietary changes, so combined diet and activity interventions are generally more effective.