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List all the combinations of four objects m, 1, n, and k taken two at a time. What is 4C₂? List all the combinations of four objects m, I, n, and k taken two at a time. Choose the correct answer below A. ml, mn, mk, Im, In, Ik, nm, nl, nk, km, kl, kn B. m, I, n, k mm, ml, mn, md, II, In, Ik, nn, nk, kk C. OD. ml, mn, mk, In, lk, nk What is 4C₂? (Simplify your answer.)

List all the combinations of four objects m, I, n, and k taken two at a time. What C List all the combinations of four objects m, I, n, and k taken two at a time. Choose OA. ml, mn, mk, Im, In, Ik, nm, nl, nk, km, kl, kn OB. m, I, n, k OC. mm, ml, mn, md, II, In, lk, nn, nk, kk O D. ml, mn, mk, In, lk, nk What is 4C₂? (Simplify your answer.)