Questions are posted on separate question.

What is one way scalawags were significant during the reconstruction in the south?

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.

How does a comet change when it comes close to the sun