Answer:
Pools that are lined with vinyl are built with metal or plastic frames above ground or set into the excavated hole. Prefab supporting walls or panels made of plastic, steel, or aluminum are joined to the frame, making a form that is then lined with heavy vinyl to form the pool shell.
Explanation:
 
        
             
        
        
        
Answer:
(A) Increased civil rights and liberties
(B) A constitutional democracy 
(D) A national legislature    
Explanation:
 
        
                    
             
        
        
        
Answer:
Several weeks? I'm not sure of the exact amount of time. 
 
        
                    
             
        
        
        
Answer:
Quizás la diferencia física más pronunciada entre mamuts y elefantes son sus colmillos. Los colmillos de mamut eran típicamente más largos en proporción al tamaño del cuerpo y más dramáticamente retorcidos y curvados que los colmillos de elefante.
 
        
             
        
        
        
16. A
17. B
18. A
19. A
20. B
21. A
22. D
23. A
These were researched answers, but I cannot guarantee you an A, just in case, I can guarantee however that most of them may be correct.