The diagram depicts a potentiometer and a fixed resistor joined across a $12\,\text{V}$ battery with negligible internal resistance. The fixed resistor and the potentiometer both have a resistance of $20\,\Omega$. The circuit is intended to give a variable output voltage. What is the range of output voltages?
- A$0$-$6\,\text{V}$
- B$0$-$12\,\text{V}$
- C$6$-$12\,\text{V}$
- D$12$-$20\,\text{V}$