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The grid shows Figure Q and its image Figure Q′ after a transformation.
Which of the following transformations could be used to prove that Figure Q and Figure Q′ are congruent?
A. Counterclockwise rotation of 90° about the origin
B. Counterclockwise rotation of 270° about the origin
C. Clockwise rotation of 90° about the origin
D. Clockwise rotation of 180° about the origin
