It has an incorrect conjunction adverb. Hope this helped!
        
                    
             
        
        
        
The simple subject is the main word of the subject, without any adjectives or modifications, one that would be enough to form a correct sentence; and the complete subject is one with all the adjectives and modifiers. 
For example: B: 
Dinosaurs: simple subject
 <span>Large and small dinosaurs: complete subject. 
In option C </span>the simple subject is the complete subject: "Cory"
        
             
        
        
        
Answer:
A, for me seems likely but D is also possible