Which of the following is noted as a key to minimizing systematic differences between multigroup design conditions before a study begins?

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Random assignment is a key method for minimizing systematic differences between multigroup design conditions before a study begins. It ensures that participants are distributed evenly among groups, reducing the likelihood of differences in characteristics between the groups. Removing covariates is a method used during analysis, rather than before the study begins, to control for the effects of specific variables. Repeated measure designs are used when measuring change over time within one group, rather than comparing multiple groups. Cluster sampling is a method of selecting participants that does not necessarily address systematic differences between groups.

Which of the Following Is Noted as a Key to Minimizing