Shannon is a researcher who studies sleep patterns in humans. Shannon most likely uses __________

A) laboratory observation.
B) only adult participants.
C) naturalistic observation.
D) structured observation.

Laboratory Observation

A research method in which subjects are observed in a controlled environment to gather data.

Naturalistic Observation

A research method involving observing subjects in their natural environment without interference.

Adult Participants

Individuals over the age of majority, often involved in studies, research, or activities requiring legal adulthood.