The equation of circle A is x2 + y2 + Cx + Dy + E = 0. If the circle is moved horizontally to the left of the y-axis without changing the radius, how are the coefficients C and D affected?

A.
C and D are unchanged.
B.
C becomes positive, and D is unchanged.
C.
C becomes negative, and D is unchanged.
D.
C becomes negative, and D becomes positive.