PLEASE HELP with my homework

Which statements describe conflicts that develop because of the frame-story structure? Check all of the boxes that apply to the story you read.

A.) The narrator is not able to tell his daughter the truth about his experience.
B.) The narrator is not happy with his ability to write about the war.
C.) The experience of having killed a man in the past haunts the narrator in the present.
D.) The narrator recounts the traumatic feelings he experienced when he killed a man.