Which sentence from the autobiography best demonstrates Douglass's main idea that slavery is dehumanizing? 
 a. 
 "He [master] was a cruel man, hardened by a long life of slaveholding."
 b. 
 "The home plantation of Colonel Lloyd wore the appearance of a country village."
 c. 
 "I had known what it was to be kindly treated."
 d. 
 "The week before our intended start, I wrote several protections, one for each of us."