Answer:
D. The Fugitive Slave Act
Step-by-step explanation:
Slave Power was a term used to refer to the political, economic, and social influence held by slaveholders in the South. Southern slaveholders and politicians had power in federal offices. They used their influence to maintain the institution of slavery in the South. The Fugitive Slave Act was part of the slave power which gave Southern states the power over the Northern states by using the federal government.