The best sentence that analyzes the use allusion in the passage is where he says he is not Prince Hamlet.
        
             
        
        
        
Answer:
I believe it's the sentence that says "Fear inched up her spine as she opened the door to the dark, dank and dusty room."
 
        
             
        
        
        
Answer:
The one you selected is correct.
(Education is the best path to freedom because once a person has been educated, nothing can take that from them.)
 
        
             
        
        
        
Answer:
At the Naval Surface Warfare Center outside of Washington D.C, a sophisticated indoor ocean that can recreate eight different open-water conditions is used to test models of  ships.
Explanation:
The subject-verb agreement, simply said, represents the grammar rule where subject and verb must agree in number, so if the subject is singular, the verb must also be in singular and vice versa - if the subject is plural, then the verb must be plural too.
In the given sentence we have the subject: <em>a sophisticated indoor ocean - </em>which is singular and we have the verb: <em>are</em> - which is plural, so they do not agree in number, so we have to change the number of the verb in order to have the subject-verb agreement completed.