What Enlightenment ideas were causes of the French Revolution?

The first sophisticated taxes on citizens took place as a result of which of these?

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 group was responsible for determining the borders of african colonies and later countries