11. For electrophoresis and electroosmosis, which of the following statement is not true?
(A) Electrophoretic mobility is the constant of proportionality between the speed of the ionand electric field strength；
(B) For ions with similar size in electrophoresis, their mobilities decrease with charges；
(C) Electric double layer created by negatively charged silica surface and nearby cations；
(D) For electroosmotic flow (EOF), net EOF toward the cathode when an external field isapplied；
(E) For capillary electrophoresis, the only fundamental source of broadening under idealconditions is longitudinal diffusion.