Answer:
Hi there! The answer is C: 
Explanation:
The scope of the LOWER function is limited to the select clause it is being used in. Outside of the select statement, the column will be returned as it is currently present in the database. Using the LOWER function will not automatically store data in lower case letters in the database tables. As an exercise, try creating a simple database table called "Employees" with columns "id" and "name". Then input a row using an insert statement with id as 1 and name as "BLAH". Try using the select statement with LOWER function and then without the LOWER statement. 
 
        
             
        
        
        
I think a spoof of an ad is the study of an ads rhetorical devices that is what I think I am not completely sure
        
                    
             
        
        
        
Answer:
Explain Operating System working: OS works as an intermediate between the user and computer. It helps the user to communicate with the computer without knowing how to speak the computer's language. The kernel is the central component of a computer operating systems.
Explanation:
 
        
             
        
        
        
Answer:
Network mapping.
Explanation:
Network mapping seems to be the method of mapping the server visibly and rationally in order to determine the relations at mid of the network as well as the not same nodes.
- Network mapping is the practice of security checking using software to search against services running on networks.
 - Network performance applications and software contains certain network mapping functions that customize the network