Which composition of transformations maps JK to LM?    A. Translation along (x, y) -> (x-1, x+1) and reflection across the y-axis
B. Reflection in y-axis and translation along (x, y)-> (x-1, y-2)
C. Translation along (x, y) -> (x, y-1) and rotation 90º about the origin
D. Rotation 90º about the origin and translation along (x, y)->(x, y-1)​