Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: According to Kazdin, what is the meaning of the significant increase in the intensity or frequency of a behavior when an extinction program is applied to said behavior ?: 
 Options:  <1> Burst of extinction. <2> Spontaneous recovery <3> Graduation of extinction. <4> Efficacy of extinction. <5> Positive punishment
