Because if some people are quiet they could be holding in something serious or if you are in class and you are always quiet your peers and teachers are going to wonder if something is bothering you 
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The answer is:  [B]:  "Sentence 2" .
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B adjective phrase is the correct answer
        
                    
             
        
        
        
Answer:
I neither find my keys nor my bags.
Explanation:
I think this is correct answer