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Triangle PQR was transformed to create the congruent triangle STU. Which describes how triangle PQR could have been transformed?

A. Rotated 90 (degrees) about the origin and reflected across the x-axis
B. translated 2 units down and dilated by a scale factor of 3/2
C. dilated by a scale factor of 2 and translated 3 units to the right
D. reflected across the y-axis and dilated by a scale factor of 1/2