The equation of a circle is x^2 + y^2 + cx + dy + e = 0. if the radius of the circle is decreased without changing the coordinates of the center point, how are coefficients c, d, and e affected? a) c, d, and e are unchanged. b) c increases, but d and e are unchanged. c) c and d decrease, but e is unchanged. d) c, d, and e increase. e) c and d are unchanged, but e decreases.