The Atlantic Ocean and the Pacific Ocean
Bimarck. Garibaldi and Mazzini were themselves revolutionaries, and while Cavour was a rightist he still bankrolled their campaigns.
England.
Between the two nations, there had been much conflict over this channel, England being the one to hold control of it before hand.
Hope this helps!
The answer is C: It made politics the business of every male citizen, not just a few.