Which of these transformations map the figure onto itself? Select all that apply. A. An isosceles trapezoid is rotated 180° about its center. B. A regular pentagon is rotated 72° clockwise about its center. C. A square is reflected across its diagonal. D. A regular hexagon is rotated 45° counterclockwise about its center. E. An equilateral triangle is reflected across a line coinciding with one of its sides.