Which of the Following Is the Best Example of Extinction

Multiple Choice

Which of the following is the best example of extinction?

A) After repeated presentations of the sound of a bell, a dog ceases to turn his head toward it.
B) A rat stops pressing a bar when food is no longer presented after a lever press.
C) Over a period of time, a man requires larger doses of drug Z to obtain the same effect.
D) As a result of brain damage, a woman enters a coma.