The power to establish post offices and post roads is held at which of the levels of government listed below?

Explanation:

appointment of a particular Government servant to a post was erroneous or not ... ability of the candidates under consideration. ... to be followed in such cases will be as given below.

1920 census

2010 census

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.