The answer would be D: Russia signs a treaty with the Central Powers ending its participation in World War I.
One important factor that spurred population was the construction of the Railroads and the support of the government.
<h3>Why were railroads constructed in the US?</h3>
- The reason why they railroads were built in the United States were in order to open up the settlement in those areas of the country.
- They were built to cause accessibility in the rural parts of the country and to also to make transportation easier for both humans and also for goods.
Read more on the railroads here:
brainly.com/question/13870297?referrer=searchResults
I did get a message to say hi ♂️ but
Germany, Austria-Hungary, Russia i remember this from last years history :D
France sold us the Louisiana Territory.
