Answer: A. 
Explanation: Written is the past participle of write, and when you read aloud all the other answer choices, the rest don't really make sense.
 
        
             
        
        
        
Answer:
Gretchen has always been very good at math.
 
        
             
        
        
        
Actually there are some exceptions in some cases though: a/an
example: "not only is there 3 species, but there is a 4th specimen."
        
             
        
        
        
I reckon everything but E is a correct answer.
        
                    
             
        
        
        
when you get 2 or more answers there should be a button over each one, clicking the button marks it as brainlist answer