Answer:
Italy's Unification was completed in 1870 and the factors were.
1.) The leadership of Camilo Cavour and Giuseppe Garibaldi
2.) The help of foreign powers.
3.) Italian leadership and foreign help.
Here are some reasons: They were curious. They were just natural born explorers. They wanted to spread their religion.
Answer:
Emission Standards is your correct answer.
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I think it might be C, but I am not 100% sure.