5- WHAT ONE WORD Or VERBAL EXPRESSION Is The MOST UNIVERSALLY USED One In The ENTIRE WORLD?......

A) PONDER that one for a bit!  Answer coming up soon....
B) ...and the answer is........."OK"
C) This researcher dug around a bit, trying to uncover a definitive ONE source for the origin of this expression,
         but there were many possibilities!  Will try to narrow the real origin down to...maybe one.
D)