Square ABCD is transformed to create the image A'B'C'D' as shown.
Select all of the transformations that could have been performed.
A. a reflection across the line y=x
B. a reflection across the line y = -2X
C. a rotation of 180 degrees clockwise about the origin
D. a reflection across the x-axis, and then a reflection across the y-axis
E. a orotation of 270 degrees counterclockwise about the origin, and then a relfection across the x-axis
