To answer this question, we first have to clarify some terms.
A frame story occurs when a story is told within a story. For example, in the movie "The Princess Bride," the story is told by a grandfather telling a story to his grandson. The story he tells is about the Princess Bride. The above excerpt does not have a frame structure. As a result, option B. can be eliminated.
A flashback occurs when a segment of the story goes back in time. For example, if the narrator is in the middle of a scene and then thinks about a time from his childhood, that is a flashback. However, in this excerpt from the novel, all of the action is occurring in the present. As a result, option D. can be eliminated.
That leaves options A. and C. It is clear the narration is occurring in chronological order. However, is that the best answer? To decide, look closely at what is happening in the scene. 
The narrator is doing two things here. First, the narrator describes Scotty's actions. Second, the narrator is commenting on them. For example: He begins to play a song, but then the narrator switches to commentary and describes the song's "gushy metallic complexity." Scotty plays two more songs, and the narrator comments "their amplification was fine." This format continues throughout the selection.
Therefore, the best answer to this question is option A: Multiple switches are used between the action and commentary.
        
                    
             
        
        
        
<span>B) Because the car could only seat four people, we had to make two trips. 
The comma should only be used after the first predicate !</span>
        
                    
             
        
        
        
Answer:
D
Explanation:
All of the other answers could lead to arguments and one-sided group discussions. D makes the discussion more open to everybody answering, open-minded, and cooperative. 
 
        
                    
             
        
        
        
Answer: Recycled shouldn't be capitalized. The word "just" should be deleted from the text because it's not necessary for it to be there. The word "following" should be capitalized since it's the beginning of a sentence. There should be a space between the words "and" and "dry." Delete one word "is" in the last sentence, since there are two.