C.) It is a secret route that slaves took to escape from Southern slave states to the North. Even though Harriet Tubman started this, it wasn't to help slaves become free it was to help them escape so it's C
The peasants felt oppressed by the Tsar. They felt that it was unfair how they could not get certain jobs. They also didn't like that the most well off people in the Russian Empire were the most favored by him, while the poor were suffering.