Two identical disks of mass M, radius R rotate about fixed axes of radius r with negligible mass. Identical masses, m, are attached to strings wrapped around the axis and the outer rim as shown in the figure. The masses are then released from rest at the same height h above the ground. Which one takes longer to hit the ground, and which mass m, has more kinetic energy when it hits the ground?

A. The mass in I hits the ground first and has more kinetic energy. The mass in I hits the ground first.
B. The mass in II has more kinetic energy.
C. The mass in II hits the ground first and has more kinetic energy.
D. The mass in II hits the ground first. The mass in I has more kinetic energy.
E. Both masses reach the ground at the same time and have the same kinetic energy.