This question is giving me problems. Consider Gauss's law: (integral) E.dA = qenc/(perm. free space). Which is true? A. If q = 0, then E = 0 everywhere on the surface. If there is no enclosed charge, there is no flux.. so no electric field, correct? B. On the surface, E is everywhere parallel to dA. This is true, at least for spherical surfaces. C. A charge outside the surface cannot affect E on the surface. I don't think this is true. Why wouldn't it affect it? D. E must be the electric field due to qenc. Even with an enclosed charge, E inside the surface is still 0. There is also a none of the above option. Could multiple answers be correct? I think A and B are both true.