What is a major problem with naturalistic observation

A)  It works well with animals but is virtually useless for studying human behaviour. 
B)  Researchers have a difficult time determining whether a setting is truly natural. 
C)  It is limited by the constraints of random sampling and random assignment. 
D)  It is difficult to observe behaviour without having an influence on that behaviour.

Naturalistic Observation

An investigative technique that involves watching participants in their unaltered surroundings without any intervention from the person observing.

Human Behaviour

Refers to the range of actions and mannerisms exhibited by humans in conjunction with their environment, influenced by culture, attitudes, emotions, values, ethics, authority, rapport, hypnosis, persuasion, coercion, and/or genetics.

Random Sampling

A method of selecting a sample from a population where each member has an equal chance of being chosen, ensuring the sample's representativeness.