Canals cut the cost of transporting materials, improved railroads which helped the movement of heavy wagons, railroads linked manufacturing cities with different materials.
B - Spain in the US signed the Adams Onis Treaty to allow Florida to become a US territory.
The Adams-Onis treaty signed in 1819 (also known as the Floriday Treaty) ceded Florida to the US.
Assuming you're referring to the idea that the Death Penalty should be made illegal (abolished), then this idea got its start all the way back in the Enlightenment, especially with Cesare Beccaria's 1767 essay, "On Crimes and Punishment".
