Which answer matches this clue: the only national park, extending through Minho and Tras-os-Montes?

• A Laurisilva
• B Ria Formosa
• C Peneda-Geres National Park ✓
• D Iberian lynx

Peneda-Geres National Park is the match: the only national park, extending through Minho and Tras-os-Montes.