In a two-dimensional region of space, a series of concentric circular equipotential curves is mapped. The electric potential of the \(n\text{th}\) curve is given by \(V_n = n V_0\), where \(n = 1, 2, 3, \dots\), and its corresponding radius is \(r_n = R_0 \sqrt{n}\), where \(V_0\) and \(R_0\) are positive constants. Which of the following expressions best represents the magnitude of the radial electric field \(E(r)\) as a function of distance \(r\) from the origin?