The simple presence of railroads could bring a city economic prosperity. Railroads even helped shape the physical growth of cities and towns, as steam railroads and then electric street railways facilitated growth along their lines and made suburban living feasible.
The Incas unified their empire through the spread of their language, compulsory military service for conquered peoples.
Yes they did. Most likely, they were new people.
C to move eastern Indian tribes to lands west of Mississippi
“The political geography of this nation was a product of various treaties and acquisitions that eventually resulted in the country extending from the Atlantic to the Pacific Ocean.”
So the answer must be:
C.) The United States gained the area between the Atlantic Ocean and Appalachian Mountains from the original thirteen colonies in 1770.