Which of the following describes the most important effect the tank had on world war 1

What led to violence in kansas in 1854? a.) northerners and southerners disagreed over the results of the slavery vote. b.) people in kansas wrote the fugitive slave law. c.) people voted for kansas to be a free state. d.) nebraska was split into kansas and nebraska

How did the united states obtained the purchase of floridia to extand its frontiers to the pacific ocean

Does anyone know why the second great awakening occurred? (i need an answer asap because this is a question on my assignment! < 3 : ))