Which one is right???

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

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

What are the biggest challenges facing the average american citizen today? explain.