What event made southern states finally decide to secede? (Civil War Causes)

a. The election of Abraham Lincoln

b. The Kansas-Nebraska Act

c. The Dred Scott decision

d. The Missouri Compromise

The battle of sabine pass is important because? a) it was a stalemate between union and confederate armies. b) it resulted in the largest confederate casualty in the war. c) it marks the failed attempt of the union army to invade the confederate state of texas. d) it was won by the union soldiers and marked a turning point in the western front of the war.