Answer: Filter Question.
Explanation:
To carry out an investigation different stages must be followed, one of them is to select the people who will participate. To determine whether or not a person is suitable to participate in an investigation, questionnaires are carried out which include the filter questions.
Filter questions include criteria that qualify or disqualify a person from participating in an investigation.
For example, you can research only with people between 20 and 30 years old, so in the questionnaire given to the participants, you would ask the age of the people, and only those who are that age would be accepted, and disqualify those who are older or younger.
I hope this information can help you.