A potential divider circuit is set up using one variable resistor X and one fixed resistor Y, as illustrated. The potential difference across resistor X is $V_x$ and the potential difference of resistor Y is $V_y$. If the resistance of X is made larger, what change occurs in $V_x$ and in $V_y$?
- A$V_x$ falls, $V_y$ rises
- B$V_x$ falls, $V_y$ stays the same
- C$V_x$ rises, $V_y$ falls
- D$V_x$ rises, $V_y$ stays the same