Economy means manage of something hope this helps
Answer:
D. Informed Consent to Research
Explanation:
informed consent to research is a voluntary agreement to participate in a study. the subject must be made aware of the research in details and must consent to it before the start of the research.
in this case, Professor Hammond did not notify the students or seek their consent before the start of the study. However, due to the nature of the study, if the students are aware it may affect the results. thus it is adviceable to notify their guardians for consent.
Huhhh translate then I could help
You have experienced stress, and your nervous about how it is going to go. But the best thing for you to do is take a deep breathe and don't worry about it because you know you will do great. <span />
Variation mostly relates to the context