A substantiated opinion is best supported by facts, like : studies, data, and research. 
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Kristallnacht 
This event came to be called Kristallnacht (The Night of Broken Glass) because of the shattered glass that littered the streets after the vandalism and destruction of Jewish-owned businesses, synagogues, and homes.
        
             
        
        
        
Answer:
the persian began decline
Explanation:
i do edge courseware and got it correct brainlest answer plz