The Electric Force on an Ion in Solution Is
A) $\beta$

The electric force on an ion in solution is

A) qE (q is the charge and E is the electric field intensity)
B) dV/dx (V is the voltage)
C) -dV/dx (V is the voltage)
D) $\beta$ v (v is the velocity, $ is the drag coefficient)
E) vC (v is the velocity, C is the concentration)