Current Density Describes the Amount of Current Concentrated Under an Electrode

Current density describes the amount of current concentrated under an electrode and is a measure of the quantity of charged particles moving through a specific cross-sectional area of body tissue. What is the relationship between electrode surface area and total current flow?

A) When the electrodes are small, the current density is high.
B) When the electrodes are large, the current density is high.
C) Current flows more easily in smaller electrodes.
D) There is no relationship between electrode surface area and total current flow.