Which statement below represents a summary of a key belief of Social Darwinism? A) Religious and scientific worlds should be kept separate

B) Human beings had reached a point where competition among was no longer necessary

C) Socialism held the answer to the worlds economic problems

D) Powerful nations were meant to dominate weaker ones

I think it's D

Why? because Darwinist believed that society should not protect it's weaker nations, but should have stronger/ powerful nations to survive and the weaker ( less fit ) to be excluded.

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.