Which european power was britain's primary rival as it began to build an empire?

Question 10 of 102 pointswhat was one major effect of the spread of railroads throughout great britainduring the industrial revolution? oa. factories were able to more easily ship manufactured goods tomarkets across the country.ob. agricultural production fell substantially due to farmland beingreplaced with railroads.oc. steam engines fell from popularity due to railroads' reliance onalternative energy sources.od. iron replaced coal as the most important raw material produced ingreat britain.submit

Study the graph and then complete the analysis of the data by filling in the missing information.

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?