I think the correct answer from the choices listed above is option C. The average salt content of seawater as measured in parts per thousand (ppt) would be 35 ppt. <span>The salinity of </span>seawater<span> is usually 35 </span>parts per thousand<span> in most marine areas. Hope this answers the question.</span>
        
                    
             
        
        
        
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it. 
        
             
        
        
        
Answer:
Ummmm... I think it is A?
Could u look at my most recent question and possibly help?