Which answer matches this clue: the Argentine coach who invented catenaccio at Inter Milan and won two consecutive European Cups in the 1960s?

• A Nereo Rocco
• B Giovanni Trapattoni
• C Helenio Herrera ✓
• D Arrigo Sacchi

Helenio Herrera's catenaccio system used a libero and rapid counter-attacks; his Inter side was known as Grande Inter for its dominance.