The locus of the centers of the circles which cut the circles $x^2 + y^2 + 4x - 6y + 9 = 0$ and $x^2 + y^2 - 5x + 4y - 2 = 0$ orthogonally is
- A$9x + 10y - 7 = 0$
- B$x - y + 2 = 0$
- C$9x - 10y + 11 = 0$
- D$9x + 10y + 7 = 0$
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