The Answer: The best way to understand someone's true abilities is to listen to him or her use language
 
        
                    
             
        
        
        
Coffin, daym draw something XD
        
                    
             
        
        
        
A (A.) biography is a complete analysis and telling  of the life story of a person who is not the author. 
 A memoir is a compilation of (B.) memories about moments or events in the life of the author.
However, the information provided in both the works is supposed to be (B.) factual.
These are the answers for Plato users;
Hope this helps <3