It's def jj. and c on edg ;)
        
                    
             
        
        
        
Most operas begin with an overture, an orchestral introduction that includes many of the musical themes of the piece.
 
        
             
        
        
        
Answer:  D. Sections of recitative, aria, and chorus flow smoothly from one section to the next.
Explanation: That would be the only reasonable answer. 
 
        
             
        
        
        
the answer is 80
you divide 64 by the numerator, 4, which gives you 16, which you then multiply by the denominator, in this case it is 5, 16 x 5 equals 80.