Why, according to douglass' new owner, mr. auld, is douglass forbidden from learning to read and write, as stated in chapter 6 of the narrative of the life of frederick douglass? a. mr. auld says that the law forbids teaching a slave to read. b. mr. auld explains that if douglass learns how to read, he'll learn the signs of how to leave the city. c. mr. auld says it is unlawful and unsafe; there would be no keeping him afterwards. d. mr. auld is afraid that douglass would be able to read his ownership documents.