What was a major cause for the Third Italian War of Independence?

Question

the border disputes with France and later with Prussia
the simultaneous attack of Austria by Prussia and Italy in 1866
the desire to create a vast Italian empire in central Europe

C?

Answer 1

wait no it's B right?

Answer 2

But Italy is in southern Europe,

https://en.wikipedia.org/wiki/Third_Italian_War_of_Independence

Answer 3

The simultaneous attack of Austria by Prussia and Italy in 1866
is your answer

Answer 4

The correct answer is B