ClC Cl^- Channels (I)assist in Transport by Forming a Strong Electrical Dipole with Electrical

ClC Cl^- channels
(I) assist in transport by forming a strong electrical dipole with the N-terminal end positively charged.
(II) effectively funnel ions into the pore via electrostatic interactions with basic amino acids.
(III) have a selectivity filter constructed from the N-terminal ends of α-helices,whose dipoles attract Cl^- ions.
(IV) rely on the side chain hydroxyl groups from Ser and Tyr.

A) I,II,II,IV
B) I,II,IV
C) II,II,IV
D) III,IV
E) I,IV