Suppose x is any positive number. circle 1 has a center at (−2, 7) and a radius of 8x. circle 2 has a center at (−3, 0) and a radius of 5x. why is circle 1 similar to circle 2? a. circle 1 and circle 2 have the same circumference, and circle 1 has a radius 1.6 times the length of circle 2's radius. b. circle 1 and circle 2 have the same area, and circle 1 has a radius 0.625 times longer than circle 2. c. circle 1 is a translation of 1 unit right and 7 units up from circle 2, and a dilation of circle 2 with a scale factor of 0.625. d. circle 1 is a translation of 1 unit right and 7 units up from circle 2, and a dilation of circle 2 with a scale factor of 1.6.