Which of the coordinate pairs below are separated by a vertical distance of less than 6 units? Select all that apply. A) (-5, 1.4) and (-5, -5) B) (6, 0.2) and (6, -1.6) C) (2.2, -3) and (2.2, 2.5) D) (-3.6, 7) and (-3.6, -1)