Select the correct answer.Consider these functions:f(x) = -2x - 1g(x) = -1/2 x + 1/2Which statements, if any, are true about these functions?1. The function f(g(x)) = x for all real x.II. The function g(x)) = x for all real x.III. Functions fand g are inverse functions.A. I onlyB. II onlyC. I, II, and IIID. None of the statements are true.