Answer:
C. perplexed 
Explanation:
Perplexed is a word that you can use in place of confused, mystified...etc 
They are all synonyms of each other.
 
        
             
        
        
        
Ben is the simple subject?
        
             
        
        
        
C is correct, mainly the sang word for a dependent clause as well as the choir word
        
                    
             
        
        
        
D. It provides people with opportunities to learn.
<span>
This aspect of education is universal. By definition,
education is the process of receiving or giving systematic instruction,
especially at a school or university. Education has had many forms and it has
been around since ancient times. Education doesn’t always have to be formal and
sometimes it can just mean “an enlightening experience”.  All over the world, education gave people the
chance to share what they know and to learn from someone in authority or from
peers.</span>