Immigration. The song's other title was "They're coming to America", it's a song about american dream, and opportunities which america gives.
China, Hong Kong, Vietnam and many other small countries
A and C can work and D is partially true I would go with a or d tho
The abolitionist movement was against people being dis-empowered and enslaved because of their colour. The feminist movement grew from the same point, particularly in the USA and England, for women realized they had been dis-empowered because of their gender. Neither gender or colour was choice.