In the diagram below, △STU is the result of a dilation of △PQR. Which fact could be used to PROVE that the corresponding angles of the triangles are congruent? A. The center of the dilation is inside △PQR. B. The sides of △STU are parallel to the corresponding sides of △PQR. C. The scale factor of the dilation is 4. D. The sides of △STU are congruent to the corresponding sides of △PQR.