Which answer matches this clue: the Naples cathedral ceremony where worshippers wait for a saint's dried blood to liquefy?

• A Festa di Sant'Agata
• B Festa di San Nicola
• C Festa di San Gennaro ✓
• D Festa di Santa Rosalia

The miracle of San Gennaro occurs three times a year; when the blood fails to liquefy, local tradition considers it an omen of disaster.