Answer:
A) folkways.
Step-by-step explanation:
William Graham Sumner was an American sociologist who coined the term folkways, in his book "Folkways: A Study of the Sociological Importance of Usages, Manners, Customs, Mores, and Morals (1906)". Folkways are the norms of casual interaction emerged from routine or repetition. folkways are shared habits of a group of people, which do not have moral significance and severe consequences.
As per the question, Ifeanyi's exposure to the new social norms is an example of folkways.