In a spherically symmetric region of space, the electric potential as a function of radial distance \(r\) from the origin is given by \(V(r) = \dfrac{V_0 R}{r} e^{-r/R}\) for \(r > 0\), where \(V_0\) and \(R\) are positive constants. Which of the following expressions represents the magnitude of the radial electric field \(E(r)\) in this region?