I think the answer should be A
        
             
        
        
        
Answer:
he coud identify 27 songs. 
Explanation:
i got this because he identified rough 1.11 songs per minute, so i divided 30 by 1.11 and got 27. 
im sorry if this is wrong, however, i believe its correct. 
 
        
                    
             
        
        
        
Secondary sources is the right one
        
             
        
        
        
Sharecroppers were free people and slaves weren't. Slaves didn't "rent" a piece of someone's land and work on it. They were forced to work on land since they were owned by the land owner.