A technician is testing a uniform rod of mass \(M\) and length \(L\) that is mounted on a horizontal axle. The axle is oriented perpendicular to the rod and passes through a point located a distance \(d\) from the rod's center of mass. The technician applies a constant net torque \(\tau\) to the rod, causing it to rotate about the axle. Which of the following expressions represents the magnitude of the angular acceleration \(\alpha\) of the rod?