Answer:
multi-stage cluster.
Step-by-step explanation:
The National Crime Victimization Study identifies topics by choosing rural counties or urban areas as main sampling units, then selecting geographical areas within those units, and then selecting addresses within geographical areas. This is an illustration of a sampling method for a multi-stage cluster.
Multi-stage sampling may be a conceptual model of cluster sampling as it is a method of sampling involving the division of the demographic into groups (or clusters). Then 1 or more than 1 clusters are randomly selected and all of them are sampled within the selected cluster.