Context: As a boy , I could never understand why my father was reluctant to talk about his military service . He was hardly a shy man . And he loved this country and would and did kill its enemies .
Question: As a boy , why could I never understand why my father was reluctant to talk about his military service ?
Option 0: Because he killed his country 's enemies .
Option 1: None of the above choices .
Option 2: Because it 's a difficult thing for a child to understand .
Option 3: Because he was a shy man .
Answer: 2