What did South Carolina point to as evidence that Northern states had broken the contract between the states, and thus freed South Carolina to leave the United
States?
a. The North's support for a high, protectionist tariff to help northern industries while oppressing the South.
b. Northern states forcing Southerners to allow Native Americans to return to their lands in Georgia and Florida.
C All of the above.
d. The North's liberty laws, which violated the Fugitive Slave law.