The equation for a circle with center (h, k) is (x - h)2 + (y - k)2 = r2. If a circle is modeled by the equation (x - 4)2 + (y + 6)2 = 49, what is the center of the circle? A) (4, 6) B) (4, −6) C) (−4, 6) D) (−4, −6)