Which of the Following Is NOT One of the Reasons

Which of the following is NOT one of the reasons that social psychologists will study the behaviour of solitary individuals?

A) The behaviour of individuals who are alone is unaffected by social influences, so it can be seen as a "pure" behaviour.
B) The contrast between the behaviour of isolated individuals and individuals in groups is important to consider.
C) The behaviour of an individual, when alone, is still influenced by socialization and social learning.
D) An individual's behaviour can be affected by the actual, imagined, or implied presence of others.