Which Is an Example of a Chemical Change

Which is an example of a chemical change?

A) The milk in the carton became frozen after the carton was accidentally placed in the freezing compartment.
B) The bit of scrap metal was crushed by the heavy machine.
C) The gas was cooled until it eventually became a liquid.
D) The piece of paper was cut into many thin strips by the shredding machine.
E) Bubbles were seen on the egg shell after some vinegar was poured on it.