After Many Media Reports of Aggressive Behavior by Parentsand Other

After many media reports of aggressive behavior by parentsand other adult spectators in the stands at Canadian youth hockey games, psychologists used a method called naturalistic observation to study spectator behavior. Using the naturalistic observation method means that:

A) researchers must avoid being detected by their subjects.
B) behaviors are observed in their natural settings, not in a lab.
C) researchers may study behaviors that cannot ethically be manipulated in an experiment
D) All of the answers are correct.