The Graph in the Figure Shows the Electric Field Strength

Short Answer

The graph in the figure shows the electric field strength (not the field lines)as a function of distance from the center for a pair of concentric uniformly charged spheres.Which of the following situations could the graph plausibly represent? (There may be more than one correct choice.)
A)a positively charged conducting sphere within another positively charged conducting sphere
B)a positively charged conducting sphere within an uncharged conducting sphere
C)a solid nonconducting sphere,uniformly charged throughout its volume,inside of a positively charged conducting sphere
D)a positively charged nonconducting thin-walled spherical shell inside of a positively charged conducting sphere
E)a positively charged nonconducting thin-walled spherical shell inside of another positively charged nonconducting thin-walled spherical shell