The diagram shows part of a circuit that is used to turn street lamps on and off automatically. In the evening, darkness falls. Which row shows how the resistance of the light-dependent resistor (LDR) changes and how the potential difference (p.d.) across the LDR changes?
- Aresistance of LDR decreases; p.d. across LDR decreases
- Bresistance of LDR decreases; p.d. across LDR increases
- Cresistance of LDR increases; p.d. across LDR decreases
- Dresistance of LDR increases; p.d. across LDR increases