Consider a region inside which there are various types of charges but the total charge is zero. At points outside the region.

Options

A. the electric field is necessarily zero.
B. the electric field is due to the dipole moment of the charge distribution only.
C. the dominant electric field is `alpha 1/r^3`, for large r where r is the distance from the origin in this regions.
D. the work done to move a charged particle along a closed path, away from the region will be zero.