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I HAVE TO SAY GOOD BYE UNTIL NEXT WEEKEND.  I WILL ANSWER THE QUESTION POSED IN MY QUIZ.  AS STRANGE AS IT MAY SEEM, THE ANSWER IS NONE!  SOME YEARS AGO, I STUMPED SEVERAL COLLEGE PROFESSORS--INCLUDING THE HEAD OF THE HISTORY DEPARTMENT--WITH THIS SAME QUESTION.  THE FOUR MOTION PICTURES ARE:  THE INFORMER, HOW GREEN WAS MY VALLEY, THE GRAPES OF WRATH, AND THE QUIET MAN.  ONLY ONE--THE GRAPES OF…