Justify means to show or prove to be right or reasonable 
(0x0xx0Information Credited To Google Definitions0x0xx0)
        
                    
             
        
        
        
(don't know the first)
I have never seen so many pairs of shoes.
My backpack is here.
Here is my dog.
The student in the first row sat, smiling.
The ship sank floundering beneath the waves.
        
             
        
        
        
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>
        
                    
             
        
        
        
Groaning, “Oh my shin, oh my shin”
        
                    
             
        
        
        
The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie in Sarajevo (the capital of the Austro-Hungarian province of Bosnia-Herzegovina) on 28 June 1914 eventually led to the outbreak of the First World War