Which of the following statements describes Italy in the twenty-first century?

1) Italian unification brought together northern Italy, peninsula Italy, and the islands including Sicily and Sardinia, and these regions continue to be unified today.
2) In 2001, constitutional reforms gave Italy's 20 regions more power over taxes, education, and environmental issues.
3) Northern Italy remains economically stronger than southern Italy, Sicily, and Sardinia.
4) All of the above.