I am pretty sure it is A or C.
Answer:
Informed consent and anonymity
Explanation:
This researcher has violated the anonymous and informed consent clause. Informed consent has to do with participants knowing the reasons for the informations they provide before they give it out. This researcher was not honest with the students because what he told them he needed the emails for was different from what he ended up using them for. He breached the anonymous clause and the privacy of the students by doing this.
Tests impacted by diurnal fluctuation are frequently scheduled as scheduled examinations, and it is critical to collect them as near to the time requested as feasible.
<h3>What is Variation?</h3>
Variation refers to the change in the situation or the condition of the something or someone. It can be the slightest of the change.
Scheduled tests are frequently required for tests impacted by diurnal fluctuation, and it is critical to collect them as near to the time ordered as feasible.
Therefore, it can be concluded that Scheduled tests is the correct option for the blank.
Learn more about Variation here:
brainly.com/question/17287798
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They could pollute their own water and kill themselves