+912 Which statement explains why △ABC is congruent to △A′B′C′?
A. You can map △ABC onto △A′B′C′ by reflecting it across the y-axis and translating it 6 units down, which is a sequence of rigid motions.
B. You can map △ABC onto △A′B′C′ by reflecting it across the x-axis and translating it 6 units left, which is a sequence of rigid motions.
C. You can map △ABC onto △A′B′C′ by rotating it 90°clockwise about the origin and translating it 4 units left, which is a sequence of rigid motions.
D. You can map △ABC onto △A′B′C′ by rotating it 180° about the origin and translating it 2 units right, which is a sequence of rigid motions.
