Choices:
A). an object;
B). coiled;
C). mechanical;
D). elastic;
E). nerves;
F). arteries;
G). waves;
H). small;

Fact 1: Arubber band snapping causes the particles in the rubber band to vibrate. Fact 2: After all, rubber bands tend to snap when stretched too thin. Given the two facts above, when stretched too thin what kind of bands will vibrate?
Answer:
D).