A Student Has Made the Statement That the Electric Flux

A student has made the statement that the electric flux through one half of a Gaussian surface is always equal and opposite to the flux through the other half of the Gaussian surface. This is

A) never true.
B) never false.
C) true whenever enclosed charge is symmetrically located at a center point, or on a center line or centrally placed plane.
D) true whenever no charge is enclosed within the Gaussian surface.
E) true only when no charge is enclosed within the Gaussian surface.