2.  To allow the search pattern HELLO to match both hello and HELLO, 
you would use the grep command with which command line switch? 
   A.  -w  
   B.  -r  
X C.  -i  
   D.  -k  
   E.  None of the above  

The 'test' claims that answer 'A' is correct:
     "-w" is match whole word.

But the correct answer is really:
     "-i" is ignore case. 

The question is about case not about word boundry,
which would be something like:
     "HELLO" verus "HELLOTHERE"