Write the standard equation of the circle with center (2, 3) and a diameter of 12.

(x - 2)2 + (y - 3)2 = 36

(x + 2)2 + (y + 3)2 = 12

(x - 2)2 + (y - 3)2 = 6

(x - 3)2 + (y - 2)2 = 36