Guilt i believe because when you feel guilty you have that feeling that you did something wrong or hurtful.
        
             
        
        
        
In "Symptoms" John Steinbeck analyzes the post war effects of the soldiers from World War II and in “Ambush Tim O’Brien show his remember of a soldier that die in Vietnam war, he alludes to My Khe a Vietnam Beach during his story, the answer is A. World War II and the Vietnam War