Final answer:
The Fugitive Slave Act of 1850 intensified the efforts of the Underground Railroad rather than scaling them back, as more individuals became involved in assisting runaway slaves. The correct answer is option E.
Step-by-step explanation:
The correct answer to the question is: E. the underground railroad scaled back its efforts. The Fugitive Slave Act of 1850 had several significant impacts that included drawing more people into the antislavery movement, imposing heavy fines and jail sentences on those who aided runaway slaves, and federal commissioners receiving higher fees for deciding in favor of the slaveholder. However, contrary to causing a scale-back, the Act galvanized the Underground Railroad activity as more free blacks and sympathetic northerners joined efforts to help escaped slaves reach safety in Canada and other parts of the North, thus strengthening the resistance against the Act.