D I think because none of the others seem like very important things, 
        
                    
             
        
        
        
Answer:
d. This statement results in input failure.
Explanation:
We are taking input of 3 variables only and those are x,ch,and y. cin is a C++ keyword used take input entered by the user onto the screen cin is not a variable.
The input should of type int char int as written in the code. First is x and character variable ch and then the integer variable y and there should be only three inputs.
 
        
                    
             
        
        
        
Answer:
B
Explanation:
Because you do not want to make your presentation be dark especially in a low lighted room. 
(Certified MOS 2016 Powerpoint User)
 
        
             
        
        
        
Answer:zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Explanation:
 
        
             
        
        
        
To get the number ot decoder output: 
2^n; where n is number of input
2^4
2 × 2 × 2 × 2 = 16 outputs