Final answer:
Lincoln's election to the presidency did not directly contribute to the South's decision to proceed with secession.
Step-by-step explanation:
The event that did NOT contribute to the South's decision to proceed with secession was C. Lincoln's election to the presidency. Although Lincoln's election was a major factor leading to secession, it was not the immediate cause. The other options all played significant roles in the tensions that ultimately led to the secession of the Southern states.
Learn more about Causes of secession