As we know that from our text book:- 

Work and energy has same dimensions so energy upon volume and work upon volume will have same dimensions while work is force*displacement   (W= F*d) so work/volume will have dimension of  Force/area as volume has dimension of area*length.

Similarly voltage*charge is nothing but work so volatge*charge/volume will have same dimension as work/volume that is same as that for A & B so A,B and D have same dimensions leading to C as correct answer (different from A, B & D)