An electron of mass \(m\) and charge \(-e\) is injected at the origin \((0,0)\) into the \(xy\)-plane with an initial velocity \(\vec{v}_0 = v_0 \hat{i}\). In the region \(x \ge 0\), a non-uniform magnetic field is directed out of the page, \(\vec{B} = (B_0 + \beta x)\hat{k}\), where \(B_0\) and \(\beta\) are positive constants. The dashed curves in the graphs represent a reference circular path of radius \(R_0 = \dfrac{m v_0}{e B_0}\) corresponding to motion in a uniform magnetic field of magnitude \(B_0\). Which of the following graphs best represents the trajectory of the electron in the \(xy\)-plane?