Why were prominent american writers of the 1920s called the "lost generation"

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.

Which roman emperor was responsible for a major shift in the dominate religious attitude of the roman empire?

What was the ultimate result of the final solution?