Which of the Following Is the Best Example of Extinction

Which of the following is the best example of extinction as the term is used in reinforcement theory?

A) A manager decides not to take any specific actions against an employee who has engaged in undesirable behaviour.
B) An employee refuses to do a certain task because she does not value the reward that she will receive for its successful completion.
C) A manager uses very harsh negative reinforcements to punish a worker for undesirable behaviour.
D) A worker expresses frustration and quits because he feels management has set goals that are impossible to attain.