Which of the following is not a composition of isometries:
A. Reflection over x=2 then rotation 90 degrees clockwise about the origin
B. Dilation with scale factor 1/2 then rotation 270 degrees clockwise about the origin
C. Translation (x,y)->(x-2,y+1) then reflection over the y-axis
D. Reflection over the x-axis then reflection over the y-axis