Polynomials are closed under the operation of subtraction.Which statement best explains the meaning of closure of polynomials under the operation of subtraction?A. When any two polynomials are subtracted, the coefficients of like terms are always subtracted.B. When any two polynomials are subtracted, the result is always a polynomial with negative coefficients.C. When any two polynomials are subtracted, the result is always a polynomial.D. When any two polynomials are subtracted, the result is always a monomial or a binomial.