Answer:
organizing the books
Explanation:
Compulsion: In abnormal psychology, the term compulsion is referred to as an individual's rule-based, repetitive behavior for which he or she feels the need to perform because of the reason to feel normal and avoid negative consequences to occur. An individual experiencing compulsion feels to repeatedly perform a task even if he or she feels that the act or task isn't rational.
In the question above, the compulsion is organizing the books.
The correct answer is D.
<u>It is an observational study</u><u> because the researcher is </u><u>NOT</u><u> manipulating the explanatory variable</u>, whether a person drinks green tea or not, in order to study the effect of the value it takes, over the dependent variable: LDL cholesterol level.
<u>In opposition, experimental studies manipulate the explanatory variable</u> in order to assess the effects caused on the dependent variable by such deviance.
D I'm pretty sure but good luck many ways
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