Which answer matches this clue: the volcanic caldera area west of Naples whose name means burning fields?

• A Campi Flegrei ✓
• B Colli Albani
• C Monte Amiata
• D Isola d'Ischia

The Campi Flegrei are a supervolcano caldera with ongoing bradyseism, a slow ground uplift that has displaced the port at Pozzuoli for millennia.