Regarding the resting membrane potential in peripheral nerves:

• A. membrane permeability of potassium ions via K+ leak channels produces the resting potential
• B. a decrease in extracellular Ca2+ decreases excitability
• C. decreasing external Na+ concentration lowers the resting membrane potential
• D. changing the external Na+ concentration has no effect on the action potential
• E. decreasing the external K+ concentration increases the resting membrane potential