The structural element used in both stories is the inclusion of a flashback about an event (option D) The use of it might be to portray each protagonist´s experience, in the case of "Ambush" the narrator situates his experience in <span>Vietnam between related events that take place after the war. And in "facing It" the narrator recalls the Vietnam War. </span>
Answer:
let us not wallow in the valley of despair.
