Which Is the BEST Example of Extinction

Which is the BEST example of extinction?

A) A child is praised every time he raises his hand instead of shouting out the answer
B) A young child throws a tantrum when he doesn't get what he wants. The parents decide to ignore the child every time there's a tantrum.
C) John feels the need to smoke when he's around smokers, so he stays away from them.
D) All of the answers are correct.