Q:
      
      
         
            
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
 
I (have been advocate) moderation in daily physical exercise for nearly half a century in all my writings and books.
 
         
       
      
      
      
          
      
      
      
      
      
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