A researcher who reveals his or her identity and goals to a population risks that people will alter their behaviors for the simple fact that they know they are being studied.This is called

A) ethical absolutism.
B) researcher reactivity.
C) ethical relativism.
D) Hawthorne effect.

The Hawthorne effect refers to the phenomenon where individuals alter their behavior in response to their awareness of being observed. This term originated from a study conducted at the Hawthorne Works factory, where changes in work environment led to altered productivity because workers knew they were being studied.