The correct answer is B. It has caused spending by interest groups to increase. Since the ruling, multi-billion corporations and other interest groups have funneled unprecedented amounts of money to the parties or politicians that are susceptible to further their interests via the Super PACs (that are not allowed to spend money directly in the politicians' campaigns but can spend unlimited amounts of funds independently and in favor of the party/politician of their choice).
The system of escape routes and hiding places for runaway slaves was known as Underground Railroads.
In the US, slavery led to the creation of such escape routes and safe houses in order to help slaves escape and lead a normal life after that. They would either run to Canada or free states within America which abolished slavery. One of the most famous leaders was Harriet Tubman.
Horace Mann was a key figure in ensuring all American children received a proper education.
they were ran by the powerful merchant families but mainly the Medici family
The sepoy mutiny was a widespread but unsuccessful rebellion against British rule in India in 1857–58. A rumour spread among the sepoys that the grease used to lubricate the cartridges was a mixture of pigs’ and cows’ lard. This had hurt both Hindus' and Muslims' religious sentiments which was one of the causes of the sepoy mutiny of 1857.