Hello so for the first question it would be that the people who made the trains where wanting people to see how amazing they were having these new railway trains and they had a little girl saying “I feel so jolly here” to empathize how great they were
They built dukes and canals.
I would use two sources of data for income and two for literacy. For average income I would consult the censuses if they were available at that time. In particular I would check the differences between the years 1800 and 1850. Also I would check employment records for the same trades/professions for the two years. For literacy, I would check the school records to see if there was an increase in youth completing high school and also check the university records to see how many graduates there were in the two years.
D. (A paradox is a statement that contradicts itself which makes it D)