What is the purpose of Douglass describing the better treatment of the city slaves compared to the plantation slaves in the Narrative of the Life of Frederick Douglass? 

       A. Showing how city slaves were treated compared to plantation slaves was meant to make plantation slaves angry at the unfairness of their treatment.   B. City slaves were attempting to recruit other slaves for help.   C. Douglass wanted plantation owners to read his words and treat their slaves better.   D. The comparison points out how cruelly plantation slaves were treated