Quadrilateral kjfg is congruent to quadrilateral k ' j ' f ' g '.

which sequence of transformations could have been used to transform quadrilateral kjfg to produce quadrilateral k ' j ' f ' g '?

a.
quadrilateral kjfg was rotated 90° counterclockwise around the origin and then translated 8 units down.

b.
quadrilateral kjfg was reflected across the y-axis and then translated 8 units down.

c.
quadrilateral kjfg was reflected across the y-axis and then across the x-axis.

d.
quadrilateral kjfg was reflected across the x-axis and rotated 90° clockwise around the origin.