Which Ion(s) Would Have a Positive Equilibrium Potential? (Assume a Resting

Which ion(s) would have a positive equilibrium potential? (Assume a resting membrane potential (V_m) of -70mV.)

A) A ^-, whose [ECF] is 100 mM and [ICF] is 100 mM
B) X⁺, A ^-, and B ^-ions
C) X⁺, whose [ECF] is 120 mM and [ICF] is 30 mM
D) both X⁺ and B ^-ions
E) B ^-, whose [ECF] is 140 mM and [ICF] is 30 mM