Why was trade with china halted when the mongols seized power?

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

In one to two paragraphs, compare and contrast the american, french, and mexican revolution.

Which statement best describes a major advantage of a confederal system of government over a unitary system