Who else has a very hard life?

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more. b-it made cross-country travel too expensive for ordinary americans. c-it decreased the safety of americans who moved to settle the plains. d-it shortened travel time between the east and west for all americans.

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period?

How did the results of wwi benefit the u. s.?