If △ABC is reflected through x = y with coordinates A(2,−1),B(4,−1),C(2,−3), what are the coordinates of △A'B'C'? A A'(2,1),B'(4,1),C'(2,3) B A'(−1,2),B'(−1,4),C'(−3,2) C A'(−2,1),B'(−4,1),C'(−2,3) D A'(−2,−1),B'(−4,−1),C'(−2,−3)