What did the fugitive slave act cause some abolitionists to do?

Made them angry

Explanation:

To abolitionists, this represented a huge blow to their efforts. Not only had the federal government endorsed slavery, but it had also committed to preserving the institution indefinitely.

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.