The diagram illustrates a circuit designed to check the electrical conductivity of strips made from solid substances. When the substance conducts, the bulb comes on. Separate strips of brass, nylon and zinc are each joined to the circuit one at a time. For which strips will the bulb come on?
- Abrass, nylon and zinc
- Bbrass and nylon only
- Cnylon and zinc only
- Dzinc and brass only