Answer:
A. Switch S1 is Open
Explanation:
I attach the missing figure in the image below
Since you are getting a reading of 6V which is the maximum voltage of your circuit, you can conclude that
A. Switch S1 is Open
- If the Switch S1 was closed, we would be getting a reading of 0V. This is not the case.
- Because the switch is open, there is no current going through the circuit and therefore there is not any voltage drop across the resistors. This is why their values don't affect the reading.