Do you think its true that every american citizen has a responsible to be his brother keeper listo ​

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.

What did palestinian leader mahmoud abbas promise after succeeding yasir arafat in 2004?

In a few sentences, explain how the medici family contributed to the renaissance.