The Difference in the Flow Rates of Sodium and Potassium

Multiple Choice

The difference in the flow rates of sodium and potassium ions across the cell membrane when a neuron is at rest leads to ​

A) a slightly higher concentration of negatively charged ions inside the cell.
B) a negatively charged action potential.
C) a slightly lower concentration of negatively charged ions inside the cell.
D) both a negatively charged action potential and a slightly lower concentration of negatively charged ions inside the cell.