You're using your meter to make voltage measurements in the circuit shown in the figure above. Your meter is connected between points A and C, and you're getting a reading of 6 V on the display. What can you conclude from this reading? A. Switch S1 is open. B. Resistors R1 and R2 have equal resistance values. C. Resistor R2 has a resistance value that's twice the value of either R1. D. Switch S1 is closed.