A Surface Is So Constructed That,at All Points on the Surface,the

Multiple Choice

A surface is so constructed that,at all points on the surface,the vector points inward.Therefore,it can be said that

A) the surface encloses a net positive charge.
B) the surface encloses a net negative charge.
C) the surface encloses no net charge.
D) the surface vector $\Delta$ S at all points on the surface is necessarily parallel to the electric field vector .
E) the surface vector $\Delta$ S at all points on the surface is necessarily perpendicular to the electric field vector .