Which collocation below is correct？

Which collocation below is correct？
A.Anti-heroes：Nick Carraway in The Great Gatsby and Mistah Kurtz in Heart of Darkness
B.Narrator and observer：Jay Gatsby in The Great Gatsby and Charles Marlow in Heart of Darkness
C.Anti-heroes：Daisy in The Great Gatsby and Mistah Kurtz in Heart of Darkness
D.Narrator and observer：Nick Carraway in The Great Gatsby and Charles Marlow in Heart of Darkness
正确答案：Narrator and observer：Nick Carraway in The Great Gatsby and Charles Marlow in Heart of Darkness