circle a has center of (6,7) and a radius of 4 and circle b has a center of (2,4) and a radius of 16. what steps will show that circle a is similar to circle b

the choices are:
translate circle a using the rule (x+4,y+3).
rotate circle a 45° about the center.
dilate circle a by a scale factor of 4.
reflect circle a about the origin.