What is the output of this program?

#!/bin/sh	
var="Example"
demo_function() {
    var="Linux"
    echo $var
}
demo_function
exit 0

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