A piece of a polypropylene rope floats on water, whereas a terephthalate polymer from a soda bottle sinks in water. What is the order of increasing density of these substances?
A) water< polypropylene< soda bottle< plastic
B) polypropylene< water< soda bottle< plastic
C) polypropylene< soda bottle< plastic< water
D) soda bottle< plastic< polypropylene< water
E) soda bottle plastic< water< polypropylene
Answer: B