Periodization is the division of time into periods that show some kind of characteristics, to facilitate the study of history. An example of periodization is distinguishing the Dark Ages as a period. 
Among the options periodization is visible in b. dividing China's history based on which dynasty ruled the country. 
        
             
        
        
        
You know the saying actions speak louder than words. That is a easy way to understand that words spoken carry more weight than just writing something. Words spoke are a more genuine expression from the heart than just writing something.
        
             
        
        
        
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