Respuesta :
Answer:
A
Explanation:
A longitudinal study is a type of correlational research study that involves looking at variables over an extended period of time.
Answer:
A
Explanation:
A longitudinal study is observational, researchers do not interfere the subjects. In a longitudinal study, researchers make several observations of the same subjects over a long period of time, unlike a cross sectional one, which is made over a short period of time.