Help please due in an hour!

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

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

Conflict resolution can be difficult. which of these is the best example of how the us congress resolves conflict instead of always using a majority vote?