The point (1,-6) lies on a circle and the center of the circle is at the point (1,-9). What is the equation of this circle? A. (x - 9)2 + (y - 1)2 = 9
B. (x - 1)2 + (y + 9)2 = 9
C. (x - 9)2 - (y - 1)2 = 3
D. (x + 1)2 + (y - 9)2 = 9