What is the output of the program?

#! /usr/bin/awk -f
BEGIN {
   print toupper("eXaMpLe_1_$")
}

A. countw B. wcount C. wc D. count p E. None of the above

A. dm B. rm C. delete D. erase E. None of the above

A. rdir B. remove C. rd D. rmdir E. None of the above

A. x B. y C. a D. z E. None of the above