The coordinates of a quadrilateral are (5, 8), (7, 10), (9, 12), and (11, 14). after a transformation, the sign of the x-coordinate and the sign of the y-coordinate for each ordered pair have changed. which type of transformation occurred? a) 180° rotation b) (x, y)→(x + 2, y + 2) c) reflection across the y-axis d) reflection across the x-axis