Answer:
Regional differences made governing difficult
Step-by-step explanation:
Piedmont imposed its ruler (King Victor Emmanuel II) over the rest of Italy. The Northerners named officials all over the country and established laws and taxation for the whole territory. Even the constitution was practically the same as the one drafted for the Piedmont region.
Naturally, the South (Naples and Sicily) resisted fiercely, and civil conflict plagued the first decade of the unification.