Which sets include only like terms? Choose all answers that are correct. A.{12c, -25c, 1.876c, 2/9c} B.{2 6def, -4def, 2.92def, 12/19def} C.{-1.24rs,17rs,9rs,2 4/9rs} D.{-11xyz, -3.07xy, -42yz, -6/17xz}