A simple pendulum consists of a small bob of mass \(m\) attached to the end of a light string of length \(L\). The pendulum is released from rest at an initial angular displacement \(\theta_0\) from the vertical.

Which of the following statements correctly compares the actual period of oscillation \(T\) to the theoretical small-angle period \(T_0 = 2\pi\sqrt{\dfrac{L}{g}}\) when \(\theta_0\) is large, and provides the correct physical justification?