When the States of the Lower South Seceded

When the states of the lower South seceded,

A) Buchanan declared secession illegal and boldly rallied the Unionists in the South to prevent it.
B) Lincoln thought secession a bluff and announced no plans to deal with it before assuming office.
C) Congress passed, and Buchanan signed, the Crittenden Compromise, guaranteeing the future security of slavery.
D) Lincoln indicated his willingness to compromise on extending slavery in the territories.