Select the correct answer. Two concentric circles with center A are plotted on a graph. The outer circle intercepts y at 2 and -2 and x at -2 and 2. The inner circle intercepts y at 1 and -1 and x at -1 and 1. In the image, two circles are centered at A. The circle containing B was dilated to produce the circle containing B′. What is the scale factor of the dilation? A. 1 B. 2 C. 0.5 D. -0.5