Which of the following statements about closure is false? a  polynomials are closed under addition. when you add polynomials, the result will always be a polynomial. b  polynomials are closed under subtraction. when you subtract polynomials, the result will always be a polynomial. cc  polynomials are closed under division. when you divide polynomials, the result will always be a polynomial. d  polynomials are closed under multiplication. when you multiply polynomials, the result will always be a polynomial.