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In an observational study, researchers try not to:
O
O
O
A. influence the people in the study.
B. include people who are difficult to contact.
c. ask questions that are too obvious.
O
D. photograph any of the subjects.

Respuesta :

Answer: I would say that  C researchers try not to ask questions that are too obvious. Because if the question is obvious, then I would think there would be no reason to research it. But I don't know fore sure. I hope this helps you! :)

Explanation:

Answer: Option A

explanation:

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