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."