Well the four aspects of cultural context consist of Setting, Value, Custom and Lifestyle. So therefore answer choice B appearance is naturally wrong because it should be custom.
Equiano’s story would have been useful for abolitionists as his journey on the slave trade ships was (and still is to this day) a devastating account of mistreatment and the horrors that many Africans faced. Because of this, it led many to side with the abolitionists. He was also admired for his courage and wits, which helped their image greatly.
He wants to be welcome, but wants to be cautious as well
It is either compelling or refreshing. Hope this helps narrow the answer choices down.