Question

ΔABC underwent a sequence of rigid transformations to give ΔA′B′C′. Which transformations might have taken place?

a reflection across the y-axis followed by a reflection across the x-axis

a rotation 90° clockwise about the origin followed by a reflection across the x-axis

a rotation 270° clockwise about the origin followed by a reflection across the x-axis

a reflection across the x-axis followed by a reflection across the y-axis