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1 2 3 TIME REMAINING 5 6 9 10 47:06 Which of the following statements is true about cluster sampling? O Once clusters are selected, participants are randomly selected from those clusters. O Cluster selection does not have to be random, as long as each chosen cluster is randomly sampled. O_Cluster sampling uses clusters, which are homogenous groups in regard to characteristics being studied. O Participants within clusters usually live within close proximity, which saves time and money for data collection