About electrostatic fields, which is false?

A、Solutions that satisfy both the potential differential equation (Poisson’s equation or Laplace’s equation) and the given boundary conditions are unique.;

B、The energy of the electrostatic field comes from the work done by the external force in the process of establishing the electric field.;

C、In the electrostatic equilibrium state, the conductor surface is an equipotential surface, and the streamlines are parallel to the conductor surface.;

D、On both sides of the interface, the tangent components of the electric field intensity are always equal.