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                              Q:
                           
                           
                                                      | A) By whom Nagasaki have been destroyed? | B) By whom has Nagasaki been destroyed? | 
| C) By whom Nagasaki had been destroyed? | D) By whom Nagasaki has been destroyed? | 
                              Answer:   B) By whom has Nagasaki been destroyed?
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
 
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