Answer:
Hi!
The answer to your question is option C. The authors provide a primary-source quotation from a British abolitionist named William Wilberforce.
Step-by-step explanation:
The author uses english history to support the claim that many people joined the ansislavery movement by giving a quote that can be found in the paragraph. This quore by British abolitionist William Wilberforce, brings our attention to the fact that "the popular sentiment has been very strongly expressed against the continuance of that traffick in human flesh." As we can see clearly on this quote, people were starting to realize that trafficking humans was abhorrent, and that this should stop. This shows a clear rejection of slavery. Therefore, the answer is letter C.