Current is defined (mathematically) by the equation i is equal to start fraction delta q over delta t end fraction (for average current) or i is equal to start fraction dq over dt end fraction (for instantaneous current, using calculus). using whichever definition you are comfortable with, when considering current in a wire, this can be stated (conceptually) as which of the following?

a. current is distance times charge (d times q) divided by distance times time (d times t).
b. current is the amount of charge in a wire, divided by the time it takes to fill the wire with charge.
c. current is the rate at which the total charge within the wire is changing.
d. current is the rate at which charge passes a certain place in the wire.