Why is leonardo da vinci a perfect example of a " renaissance man" ?

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.

Identify the reason each country wanted to go to war in the year before and during world war 1

What was true about the progressive movement?