If (-4, 5) is a vertex and $$7x - y + 8 = 0$$ is the equation of a diagonal of a square, then the equation of other diagonal of the square is

A

$$7x + y + 23 = 0$$

B

$$x + 7y - 31 = 0$$

C

$$7x - y + 33 = 0$$

D

$$x - 7y + 39 = 0$$