The correct answer is option B.
This belongs to the novel "Things Fall Apart" written by Chinua Achebe. Ikemefuna is a boy who is given up to Umuofia as a sacrifice. He is given to Okonkwo who is a clan leader in Umuofia.
The author's main purpose in telling us about the new customs that Ikemefuna brings to Umuofia is to show that Africa is not just one culture but is made up of lots of different subcultures.