The two trapezoids in the graph below are similar. Which sequence of transformations proves that the trapezoids are similar?
A. A reflection across the x-axis followed by a rotation 90° counterclockwise about the origin
B. A reflection across the y-axis followed by a rotation 90° counterclockwise about the origin
C. A reflection across the y-axis followed by a rotation 180° counterclockwise about the origin
D. A reflection across the x-axis followed by a rotation 180° counterclockwise about the origin