Two uniform solid disks, Disk 1 and Disk 2, have the same mass \(M\). The radius of Disk 2 is twice the radius of Disk 1 (\(R_2 = 2R_1\)). Both disks are initially at rest and are mounted on frictionless axles through their centers. The same constant net torque \(\tau\) is applied to each disk. Which of the following correctly relates the magnitude of the angular acceleration of Disk 1 (\(\alpha_1\)) to that of Disk 2 (\(\alpha_2\)) and provides a correct justification?