In the circuit diagram, a variable resistor $R$ is connected in parallel with the lower part of a potential divider. The resistance of $R$ rises. What change occurs in the two voltmeter readings $V_1$ and $V_2$?
- A$V_1$ decreases; $V_2$ decreases
- B$V_1$ decreases; $V_2$ increases
- C$V_1$ increases; $V_2$ decreases
- D$V_1$ increases; $V_2$ increases