A Hollow Conducting Spherical Shell Has Radii of 0

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in the figure. The sphere carries an excess charge of -500 nC. A point charge of +300 nC is present at the center. The surface charge density on the inner spherical surface is closest to

A) zero.
B) +4.0 × 10^-8 C/m².
C) +6.0 × 10^-8 C/ m².
D) -4.0 × 10^-8 C/ m².
E) -6.0 × 10^-8 C/ m².