The difference is that the older union tend to pursue practical things such as fair wages, number of holidays, and working hours.
The newer union on the other hand, tend to focus on something that related to social justice, such as fair treatment between each races, same opportunity to rise the ladder, etc.
The negative impact of the international slave trade on Africa was immense. It can be seen on the personal, family, communal, and continental levels. In addition to the millions of able-bodied individuals captured and transported, the death toll and the economic and environmental destruction resulting from wars and slave raids were startlingly high. In the famines that followed military actions, the old and very young were often killed or left to starve.
I going to have to say C) I hope this helped!