What Is the Rotational Inertia of a Solid Iron Disk $41.0 \mathrm{~kg}$

What is the rotational inertia of a solid iron disk of mass $41.0 \mathrm{~kg}$ with a thickness of $5.00 \mathrm{~cm}$ and radius of $30.0 \mathrm{~cm}$ , about an axis perpendicular to the disk and passing through its center?

A) $0.980 \mathrm{~kg} \mathrm{~m}^{2}$
B) $0.761 \mathrm{~kg} \mathrm{~m}^{2}$
C) $2.29 \mathrm{~kg} \mathrm{~m}^{2}$
D) $1.85 \mathrm{~kg} \mathrm{~m}^{2}$