Answer:
D
Explanation:
Americas involvement in war.
 
        
                    
             
        
        
        
Answer:
Opportunity cost is when you have a choice between a number of things. The thing/things you didn't choose are the opportunity cost, if that makes any sense.
Explanation:
I learned this in fith grade science
 
        
             
        
        
        
Answer:
In literature, a stereotype is a character that has no individuality.
Explanation:
<em>Hope This Helps!</em>
 
        
                    
             
        
        
        
Dog is the noun 
a noun is a person place thing or animal 
I hope this helps