Answer:
C
Step-by-step explanation:
Option A, "the call by Abraham Lincoln for Union troops," is not directly mentioned in the excerpt. Option B, "the election of Abraham Lincoln as president," is mentioned in the excerpt as part of the history of hostility towards slavery, but it is not specifically identified as the immediate cause of secession. Option D, "the issuance of the Emancipation Proclamation," is also mentioned in the excerpt as part of the history of hostility towards slavery, but it is not specifically identified as the immediate cause of secession. Therefore, the event that most directly incited this statement was Option C the firing of Confederate ships on Fort Sumter.