How did the toltecs and aztecs rise to power?

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 was george washington able to defeat the british in the battle of trenton and princeton

What tactic did palestinians use against israel in 1987