Collecting objective data without interference in the subject's normal environment is associated with ________.

A) survey research
B) applied research
C) laboratory research
D) naturalistic observation

Collecting objective data without interference in the subject's normal environment is best associated with naturalistic observation. In this type of research, the observer is passive and does not manipulate the environment or the subjects being observed. This allows researchers to gather data that is more authentic and reflective of the subjects' natural behavior.