Passage Summary: Usually, high cholesterol leads to heart problems, but in this one Italian town, everyone has high cholesterol and perfectly healthy hearts.

Reasoning: High cholesterol is typically linked to heart disease, yet the residents of Limone have high cholesterol and no heart disease.

Analysis: This stimulus presents a classic correlation that fails to manifest in a specific population. To resolve this paradox, we need a factor unique to the residents of Limone that protects them from the typical effects of high cholesterol. Look for an answer that introduces a biological, genetic, or environmental 'shield' that breaks the link between cholesterol and heart disease. The correct answer must explain why this specific group is the exception to the general rule.