What Is the Membrane Potential Created by a Sodium Gradient $\degree$

What is the membrane potential created by a sodium gradient where [Na⁺]_out = 145 mM and [Na⁺]_in = 12mM at 37 $\degree$ C?

A) 67 mV
B) 7.9 mV
C) -7.9 mV
D) -29 mV
E) -67 mV