Question: Dr. Morales is studying depression levels using a third grade class, a sixth grade class, a ninth grade class, and a twelfth grade class in

Dr. Morales is studying depression levels using a third grade class, a sixth grade class, a ninth grade class, and a twelfth grade class in Fall 2023. What kind of study is this? a. Cross-sectional b. Longitudinal c. Cohort d. Intra-group

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