Correct Answer - A::B::C
Inside a shell,`V =` constant and `E = 0`.
Between `A` AND `B`, `E_("net") = 0,V_("net") =` constant because these points `mu` inside both shells. ltbegt Between `B` and `C`
`E` of `m != 0`, `E of 2m = 0`
`V` of `m !=` constant, `V` of `2m =` constant.
Beyond `C`
`E` and `V` due to both shells are neither zero nor constant.