The correct answer would be option B, Longitudinal Study.
Despite the fact that this research is very time consuming and expensive, it gives very good information about how the children age over time. This type of research is an example of a longitudinal study.
Explanation:
There are many methods of research study. The one discussed in the question is Longitudinal Study research method. In this type of research methodology, the data is gathered for the same subject over a period of time.
This is an observational research methodology. The research work in this method can last for years or even decades. This is a very long research in which the subject is observed over a very long period of time.
So when Daniel conducted a study to analyze the behavior of children over the years, he used the longitudinal research methodology.
Learn more about Longitudinal Study at:
https://brainly.com/question/11371460
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