Answer:
All of them are longitudinal studies.
Step-by-step explanation:
- The survey is conducted every year now since 1991 by a sample of the population of students at the regional, state, and local levels.
- The YRBS findings help adolescents and young adults consider the factors contributing to the major causes of cancer, mortality, and injury.
- The research paper will investigate data gathered by the National Survey of Teenage Males in the fourth wave of a special longitudinal data set.