A pair of trapezoids ABCD (Bottom) PQRS (Top) are shown. The coordinates of preimage are (2,2) , (6,6) , (12,8), and (16,2). The coordinates of the image are (11,15), (9,12), (6,12) , and (4,15).  
Polygon ABCD is reflected and dilated to give polygon PQRS. The coordinates of the preimage are (2, 2), (6, 8), (12, 8), and (16, 2). The coordinates of the image are (11, 15), (9, 12), (6, 12), and (4, 15). What is the scale factor of the dilation?

A.
0.25

B.
0.33

C.
0.5

D.
0.75