How railroads changed and developed

Railroads altered American society and economic life in fundamental ways. In short, they made transportation of goods and people much cheaper and quicker. They enabled the shipping of bulk goods like farm produce and coal from one end of the country to another.

Explanation:

it's no easy i swear it's hard

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d