If you do a reflection on the x-axis, you're taking the points from (x , y) to (x , -y).
The only case where the circle won't change its center it is when the center is located at the x-axis(when y = 0).
From the examples given in the question, only the circle C won't change its center.
The answer would be:
Circle A: Support
Circle B: Support
Circle C: Refute
Circle D: Support