A digital photo on the screen of a smartphone is 5 centimeters wide and 6.5 centimeters high. After you "pinch" the screen to reduce the size of the photo, the photo is reduced to 3 centimeters wide by 3.9 centimeters high. What is the scale factor of the dilation? A. 2/5 B 3/5 C 10/13 D 39/50