Select the correct answer.

what is the general form of the equation for the given circle?

a.
x2 + y2 − 8x − 8y + 23 = 0

b.
x2 + y2 − 8x − 8y + 32 = 0

c.
x2 + y2 − 4x − 4y + 23 = 0

d.
x2 + y2 + 4x + 4y + 9 = 0