What are two possible transformations that together could have been used to create the red figure from the blue figure?

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

b) a translation of 1 unit down followed by a rotation of 90 degrees clockwise about the origin

c) a rotation of 90 degrees counterclockwise about the origin followed by a reflection across the x axis

d) a rotation of 90 degrees counterclockwise about the origin followed by a translation of 1 unit down