If the researcher is interested in utilization of police services by assault victims, it is helpful to establish victimization with

A filter question

Explanation:

Filter questions is a form of survey questionnaire, in which the questions are presented in such a way that, participants only answer questions that are applicable to them, or related to their conditions only, which will make them not to answer questions that do not relate to them.

For example, when a participants answer “yes” to filter questions, they are then asked more detailed follow-up questions, otherwise, respondents who give “no” answers, are not questioned further on the topic.

Hence, in this case, because of the sensitivity involved in the issue of assault, it is best to establish victimization with FILTER QUESTION.

well i'm late but i think its: b, c, and e