How did the population make up of the united states changed between 1776 and 1870

1) The population has increased because of the immigration and slaves. 2) The population grew in leaps and bounds, primarily through immigration. 3) Roads, waterways, railroads, steam boats, and refrigerator railroad cars. 4) * Changes in transportation played a big part in the change of United States. * The change in the industry such as more factories being opened. there you go!

.

i believe your answer is d)

  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