Respuesta :

Answer:

All of them are longitudinal studies.

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.  

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