The Movement of Potassium Ions Across a Membrane Aided by Valinomycin

The movement of potassium ions across a membrane aided by valinomycin is an example of _______________.

A) facilitated diffusion by transport through a pore
B) facilitated diffusion by transport using a carrier molecule
C) facilitated diffusion by use of a permease
D) primary active transport since valinomycin is a sodium-potassium ATPase
E) secondary active transport since valinomycin only moves with the aid of the sodium ion gradient