The basic idea of the Daoists was to enable people to realize that, since human life is really only a small part of a larger process of nature, the only human actions which ultimately make sense are those which are in accord with the flow of Nature — the Dao or the Way.
ANSWER: OPERATIONALIZE the variable.
EXPLANATION:
OPERATIONALIZATION refers to the process where by specific variable are defined and measured based on their function in a study/experiment.
However, to operationalize a variable in a study, a paradigm (theoretical framework) is used by researcher to create a concept through the process of conceptualization.
Definitions are made to back up the study, in other to remove any error or any doubt of the readers during accessing the study.
Thus, based on Jim's study. He defined the frequency and the intensity of the mood swings (as the two variables) for better understanding by the individuals.
The answer is (D) release toxic elements into the groundwater or surface water :)