Why Do Researchers Try to Avoid Being Detected by Their

Why do researchers try to avoid being detected by their participants when engaged in naturalistic observations?

A) The researchers themselves could be considered a dependent variable that affects the results of the study.
B) Naturally occurring behavior patterns might not occur if the participants become aware that they are being observed.
C) It is unethical to engage in any kind of research, even naturalistic observation, unless participants give their prior permission.
D) Participants may continue to act naturally with the researchers, but the researchers may not act like researchers once they begin to interact with the participants.