A triangle has vertices A(-3, 6), B(1, 5), and C(2, -4). After a transformation, the image of the triangle has vertices A’(-3, -6), B’(1, -5), and C’(2, 4).

Identify the transformation.

reflection across the y = -x
reflection across the y = -x

reflection across the y = x
reflection across the y = x

reflection across the x-axis
reflection across the x-axis

reflection across the y-axis