Which of the following abolitionists is known for delivering powerful speeches that emphasized the need for immediate emancipation?

Frederick Douglass is well-known for his compelling and eloquent speeches advocating for the immediate emancipation of enslaved people. Having escaped from slavery himself, he used his personal experience to highlight the injustices of slavery and argued fervently for its abolition. Douglass's speeches, such as those delivered at various anti-slavery conventions, were impactful in persuading many of the urgent necessity of ending slavery without delay. His ability to articulate the moral and ethical need for immediate emancipation helped to galvanize public support for the abolitionist movement during the mid-19th century.

In contrast, while both Sojourner Truth and William Lloyd Garrison were also crucial figures in the abolitionist movement, Truth is more famously known for her speeches regarding women's rights and slavery, and Garrison advocated for immediate emancipation through his writings and advocacy, rather than through the same speaking platform as Douglass. Susan B. Anthony, although a significant social reformer, is primarily recognized for her work in women's suffrage, rather than a focus on the immediate emancipation of slaves.