On a coordinate plane, triangle A has points (0, 0), (negative 2, 3), (2, 3). Triangle A prime has points (0, 0), (negative 3, negative 5), (3, negative 5). The pre–image, A, was dilated about the origin. It was then transformed in another way to get A'.

What was the transformation after the dilation?
rotation 90° counterclockwise
translation down 9 units
reflection over the x-axis
reflection over the y-axis