I think the answer is A. Correct me if I’m wrong please
        
                    
             
        
        
        
The answer is :
Una carpeta 
Necesito una carpeta para guardar todas las hojas de papel.
        
             
        
        
        
Answer:
I believe the answer is the first one, clases-llenas.
Explanation:
Clases is a feminine word (las clases, la clase), so it only makes sense for the adjective after it to be feminine as well (llenas). Please let me know if you still need help with this, and only mark as brainliest if you want!