The wire was 35 cm long. The flashlight contained a battery. The plastic switch was better than the metal switch. The bulb was lit for 20 minutes before it burned out.
I gave my students this multiple choice question: Kerry made a simple flashlight. She recorded the following statements in her lab book. Which statement is an inference?

Only one answer is correct among these 4 choices:
- The wire was 35 cm long.
- The flashlight contained a battery.
- The plastic switch was better than the metal switch.
- The bulb was lit for 20 minutes before it burned out.

Could you tell me which one is correct?

The plastic switch was better than the metal switch.