Given that :
Circle A has center of (-2, 4) and a radius of 4, and circle B has a center of (3, 9) and a radius of 8.
Since circle A has radius 4 and circle B has radius 8, we can dilate circle A by a scale factor of 2, i.e., 4 × 2 = 8
Thus,
Dilate circle A by a scale factor of 2 is correct.