Circle(s) touching x - axis at a distance 3 from the origin and having an intercept of length $$2\sqrt{7}$$ on y-axis is (are)

A

$$x^2 + y^2 - 6x + 8y + 9 = 0$$

B

$$x^2 + y^2 - 6x + 7y + 9 = 0$$

C

$$x^2 + y^2 - 6x - 8y + 9 = 0$$

D

$$x^2 + y^2 - 6x - 7y + 9 = 0$$