The diagram illustrates part of a circuit that is used to turn street lamps on and off automatically. As evening comes, it becomes dark. Which row indicates the change in the resistance of the light-dependent resistor (LDR) and the potential difference (p.d.) across it?
- 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