Suppose (12, 8) and (4, 6) are the endpoints of a diameter of a circle. Which is an equation of the circle?
A) (x + 8)2 + (y − 7)2 = 17
B) (x − 8)2 + (y − 7)2 = 17
C) (x + 8)2 − (y + 7)2 = 17
D) (x − 8)2 + (y − 7)2 = 289