Answer:
"First, the plesiosaur is an air breather." is the line from the article that best disproves the plesiosaur theory. In the article, the author argues that because plesiosaurs were air breathers, they would need to come up for air more frequently than any sightings ever occur. As there are so few "sightings" every year and supposedly fewer now than ever, it is unlikely that Nessie is a plesiosaur.
Explanation:
 
        
             
        
        
        
Can you send a picture? I need more information about the article but I am pretty sure that it is A) the French invasion of Germany. 
Expansion
The story, 'The Last Lesson' has been set in the background of the Franco-Prussian war that was fought in 1870-71 between Prussia and France. The Prussians captured the districts of Alsace and Lorraine. New orders were issued according to which German language was to be taught in place of French in these two districts. It doesn’t have anything to do with World War l or ll so it have to be A) or D). The Germans didn’t invade Alsace, the Prussians did so D) can’t be it. The only answer left is A) so you’re answer would have to be A).
        
                    
             
        
        
        
The answer is D, today Russia wants to train all astronauts 
 
        
             
        
        
        
The English language has a variety of many grammatical inferences mainly because our language is more complex and is used as a national language. Such a selection of words, spellings etc are used so many can refer to a situation with grammar they can understand.
        
                    
             
        
        
        
To refute means to prove wrong by argument or evidence. It also means to show something that is false, or that has an error.