Answer:
C. Trained militias.
Explanation:
After the failed Harpers Ferry raid which was led by John Brown and eighteen other men where they tried to take over a federal armory to start a Southern slave revolt.
However, the attempt was a failure because federal troops were summoned and they were repelled.
As a result of this, a Southern governor of Virginia Henry Wise led a small group of militias to confront John Brown in addition to the federal troops and this was because the South feared that other violent plots would begin.
