In the figure, two curved plastic rods, one with a charge of +q and the other with a charge of -q, form a circle with a radius of R = 7.52 cm in the xy plane. The x axis passes through both connecting points. What is the purpose of the x axis passing through both connecting points in this scenario?

A. To provide a reference point for measuring distances
B. To create an electric field along the x axis
C. To ensure the rods are aligned properly
D. To increase the overall stability of the system