In Narrative of the Life of Frederick Douglass, why does Douglass describe the brutal treatment he received at the hands of Covey in such detail?

a to highlight the barbarism of slavery, the cruelty of slavers, and how both brought Douglass to the lowest point in his life

b to let readers see that he was the victim of a kind of savagery that was unknown to most enslaved people

c to force readers to recognize the role that they have played in allowing cruelty and injustice to exist in their own lives

d to demonstrate that his own recollection of events is more accurate and honest than the memories of Covey