What arguments did Abraham Lincoln use against the succession of the southern states select all that apply

A. Succession would need to be approved through popular 70.
B. It was a union of people not states.
C. The southern states lack the power to succeed under the constitution
D. Slavery was a system that would eventually bankrupt the southern states.

B. It was a union of people not states.

C. The southern states lack the power to succeed under the constitution.