(PLEASE HELP) Which rules represent a transformation that maps one shape onto another to establish their congruence? Select all of the possible answers.
A) A dilation by scale factor of 3 about the origin.
B) A translation to the right 2 and down 6.
C) A reflection across the line y=2.
D) A counter-closckwise rotation of 90 degrees about the origin.
E) A horizontal stretch by a factor of 2 about the origin.
