Phillips, Esterman, Smith, and Kenny (2013) identified predictors of successful transition from undergraduate student to registered nurse and whether pre-registration paid employment choice impacted that transition. In this cross-sectional study, the researchers collected data from 392 registered nurses who were grouped according to their chosen work type (hospital/retail, enrolled nurse, other healthcare worker, non-worker) and transition scores were identified. What aspects of the study indicate that it was a correlational, cross-sectional study? Select all that apply. Group of answer choices Subjects were randomly selected from the target population. The underlying purpose of the study was to explore relationships among variables that can be related to transition. Causation was established Data were collected only one time from all subjects in the study. There were several independent variables that were actively manipulated