Why is circle 1 similar to circle 2?

circle 1: center (−1, 10) and radius 4.8

circle 2: center (−1, 10) and radius 1.2

circle 1 is congruent to circle 2.
circle 1 and circle 2 have the same center.
circle 2 is a dilation of circle 1 with a scale factor of 3.6.
circle 1 is a dilation of circle 2 with a scale factor of 4.

Well the idea that all circles are similar is true. the circles have the same center so if you dilate circle 2 by the scale factor of by a scale factor of 4 they will be the same so looks to me like the answer is D)circle 1 is a dialation of circle 2 with a scale factor of 4

20×2+8×8+10×4=144
answer is D