Look at the diagram of a material tester.
A material tester. A bulb is attached to the negative end of a battery using a wire. The other end of the bulb is attached to a material. The other end of the material, again, is connected to the positive pole of the battery with the help of a wire.
Four students were each given four different objects to test to see if all objects in their group are conductors of electricity. Which group contains no objects that will light the bulb?
A. rubber band, steel nail, copper wire, stick of wood
B. yarn, cotton swab, bubble wrap, penny
C. plastic straw, wooden cube, glass marble, balloon
D. gold bracelet, metal spoon, aluminum nail, silver spoon