The equation of a circle is x^2 + y^2 + Cx + Dy + E = 0. If the radius of a circle is decreasing 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 increases