Which answer matches this clue: the short-lived Napoleonic republic that first adopted the green-white-red tricolour in 1797?
ATranspadane Republic
BRoman Republic
CParthenopean Republic
DCispadane Republic✓
The Cispadane Republic was proclaimed in 1796 and merged into the Cisalpine Republic later in 1797, but its flag became the basis of the modern tricolour.