A parallel plate capacitor of capacitance $20\ \mu F$ is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively:
A zero, $60\ \mu A$
B $60\ \mu A$, $60\ \mu A$
C $60\ \mu A$, zero
D zero, zero