A circular disk, a ring, and a square (is hollow) have the same mass M and width 2r. For the moment of inertia about their center of mass about an axis perpendicular to the plane of the paper, which statement concerning their moments of inertia is true?
a. Iring > Idisk > Isquare
b. Isquare > Iring > Idisk
c. Idisk > Isquare > Iring
d. Iring > Isquare > Idisk
e. Idisk > Iring > Isquare
f. Isquare > Idisk > Iring
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