List all the combinations of four objects m, I, n, and k taken three at a time. What is 4C3? List all the combinations of four objects m, I, n, and k taken three at a time. Choose the correct answer below. A. m, I, n, k B. mln, mlk, mnk, Ink C. mln, mlk, mnl, mnk, mkl, mkn, Imn, Imk, Inm, Ink, Ikm, lkn, nml, nmk, nbm, nlk, nkm, nkl, kml, kmn, klm, kln, knm, knl D. mmm, mml, mmn, mmk, mll, mln, mlk, mnn, mnk, mkk, III, IIn, Ilk, Inn, Ink, Ikk, nnn, nnk, nkk, kkk What is 4C3? (Simplify your answer.)