why should it be at point D? please give a thorough explaination with physics laws or principles

Figure Skaters Moving Together ABC D 2.5: Newton's Third Law and Fre O 1 = 0s 1 =2s Skill 6.4: The student can make Skater 1 at 1 = 4 s about natural phenomena based and models. Top View At time t= 0 two figure skaters are moving together over ice with negligible friction, as shown above. Skater 1, represented by the large black dot, is twice as massive as skater 2, represented by the gray dot. At t = 2 s the skaters push off of one another. The location of skater 1 is shown at t = 4 s . At t= 4 s, skater 2 is located at which of the labeled points