Research methods are the techniques used to collect the data to understand the topic. Experimentation will be the best method to understand hyperactivity. Thus, option C is correct.
An experimental method is a type of research method that employs the collection of the data based on the alterations of the variables involved with the topic matter.
This method involves many steps to accomplish and reach the result. The method is based on controlled research and is performed to test a hypothesis.
In the experiment about hyperactivity and sugar, the variables like the sugar content can be used to determine its effect on hyperactivity.
Therefore, Dr. Stein should use the experimental method of research.
Learn more about the experiment here:
https://brainly.com/question/10606621
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