The correct answers are: A and D.
In this excerpt from "Things Fall Apart", Achebe uses characterization to develop two main themes: kinship and masculinity.
The text shows Okonkwo's se*xism and discrimination against men who are not hegemonically masculine. Meaning, they present femenine characteristic and usually have homose*xual tendencies.
It also shows how the fact that it's his own son who presents this affeminated characteristics worsens the situation. How he would deny that Nwoye is his son if it weren't for his resemblance to his grandfather. How Okonkwo despises the idea of having a que*er relative.