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: What characteristic increases the veracity of self-reports?
Options: <1> Request information about past events. <2> Request information about events about which the evaluated person has little experience. <3> Use generic and open questions. <4> Request information on topics that involve little to the evaluated. <5> Use specific and unambiguous questions.
Output:
5