“Wear” focuses on clothes that you already have on. “Put on” refers to clothes that you are going to get dressed into.
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>
The sentence that contains a verbal phrase acting as a modifier is: Giving a presentation in front of my class, I suddenly developed sever stage fright.
Modifiers are optional elements in a phrase structure that even when removed, it does not affect the whole grammar of the sentence.
