After the 1860 presidential election, why did Republicans reject any further compromise on the ...

After the 1860 presidential election, why did Republicans reject any further compromise on the slavery issue?
 
  A) They believed that war was the only method left to settle the issue.
  B) They believed that moderate southerners would soon regain control, and that compromise on matters of basic principle was tantamount to surrender.
  C) They believed that the nation was better off split in half because it obviously could not exist half slave and half free.
  D) They believed that the issue had already been settled by the election of 1860.
  E) All of these choices