Wich sentence from the autobiography best explains douglass's purpose for including an explanation of the slave songs? a. i did not, when slave, understand the deep meaning of those rude apparently incoherent songs. b. those songs still follow me, to deepen my hatred of slavery, and quicken my sympathies for my brethren in bonds c. i have often been utterly astonished, since i came to the north, to find persons who could speak of the singing, among slaves, as evidence of their contentment. d. they would compose the sing as they went along, consulting neither time nor tune.