The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener diode is 6 V and the load resistance is, R$$_L$$ = 4 kΩ. The series resistance of the circuit is R$$_i$$ = 1 kΩ. If the battery voltage V$$_B$$ varies from 8 V to 16 V, what are the minimum and maximum values of the current through Zener diode?

A

0.5 mA; 6 mA

B

1 mA; 8.5 mA

C

0.5 mA; 8.5 mA

D

1.5 mA; 8.5 mA