A potential divider is made from a light-dependent resistor (LDR) connected in series with a variable resistor whose resistance is $R$. As the light intensity rises, the resistance of the LDR falls. The variable resistor may be adjusted to either a high resistance or a low resistance. In which arrangement is the output voltage greatest?
- Alight level at LDR: high; $R$: high
- Blight level at LDR: high; $R$: low
- Clight level at LDR: low; $R$: high
- Dlight level at LDR: low; $R$: low